EXHIBIT 2.1


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                        AGREEMENT AND PLAN OF MERGER

                                   among

                             KT HOLDING COMPANY

                           KT ACQUISITION I CORP.

                          AH ACQUISITION I L.L.C.

                         KNIGHT/TRIMARK GROUP, INC.

                           ARBITRADE HOLDINGS LLC

                     TARMACHAN CAPITAL MANAGEMENT, INC.
                           TARMACHAN CAPITAL CO.
                               DEEPHAVEN INC.
                            GILDOR TRADING, INC.
                               IRVIN KESSLER

                               EFRAIM GILDOR

                                PETER HAJAS

                              MERRILL FERGUSON

                                    and

                                 MARK LYONS


                       Dated as of November 17, 1999


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           THIS AGREEMENT AND PLAN OF MERGER, dated as of  November 17, 1999
 (the "Agreement"), among KT HOLDING COMPANY, a Delaware corporation
 ("Parent"), KT ACQUISITION I CORP., a Delaware corporation ("SubKT"), AH
 ACQUISITION I L.L.C., a Delaware limited liability company ("SubAH"),
 KNIGHT/TRIMARK GROUP, INC., a Delaware corporation ("KT"), ARBITRADE
 HOLDINGS LLC, a Delaware limited liability company ("AH") and TARMACHAN
 CAPITAL MANAGEMENT, INC., TARMACHAN CAPITAL CO., DEEPHAVEN INC., GILDOR
 TRADING, INC., IRVIN KESSLER, EFRAIM GILDOR, PETER HAJAS, MERRILL FERGUSON
 and MARK LYONS (together, the "Members").

           WHEREAS, KT and AH desire to combine their respective businesses
 in a transaction upon the terms and subject to the conditions in this
 Agreement;

           WHEREAS, (i) Parent is a newly formed corporation organized and
 existing under the laws of the State of Delaware, all of the issued and
 outstanding capital stock of which is owned by KT; (ii) KT is a corporation
 organized and existing under the laws of the State of Delaware; and (iii)
 AH is a limited liability company organized and existing under the laws of
 the State of Delaware;

           WHEREAS, KT has caused Parent to form SubKT and SubAH, each a
 wholly owned subsidiary of Parent, and all the outstanding capital stock of
 SubKT and all of the outstanding membership interests of SubAH are owned by
 Parent;

           WHEREAS, the Board of Directors of KT and the members of AH have
 each approved this Agreement;

           WHEREAS, the parties desire to make certain representations,
 warranties, covenants and agreements in connection with the Mergers and
 also to prescribe various conditions to the Mergers;

           WHEREAS, concurrently with the execution of this Agreement, as a
 condition and an inducement to the willingness of Parent and KT to enter
 into this Agreement, the Members have entered into employment and non-
 competition agreements with AH (the "New Employment Agreements");

           WHEREAS, for U.S. federal income tax purposes, it is intended
 that (i) the KT Merger (as hereinafter defined), taken together with the AH
 Merger (as hereinafter defined), will qualify as a transaction described in
 Section 351 of the Internal Revenue Code of 1986, as amended (the "Code"),
 and/or the KT Merger will qualify as a transaction described in Section
 368(a) of the Code, and (ii) the AH Merger, taken together with the KT
 Merger, will qualify as a transaction described in Section 351 of the Code;
 and

           WHEREAS, for financial accounting purposes, it is intended that
 the transactions contemplated by this Agreement will be accounted for as a
 pooling-of-interests transaction in accordance with United States generally
 accepted accounting principles ("GAAP").

           NOW, THEREFORE, in consideration of the representations,
 warranties, covenants and agreements contained in this Agreement, and fully
 intending to be legally bound hereby, the parties agree as follows:


                                  ARTICLE I
                            THE MERGERS; CLOSING

           Section 1.1  The KT Merger.

           (a)  Upon the terms and subject to the conditions set forth in
 this Agreement, and in accordance with the Delaware General Corporation Law
 (the "DGCL"), SubKT shall merge with and into KT (the "KT Merger") at the
 KT Effective Time (as defined in Section 1.5) and each outstanding share of
 class A common stock, par value $.01 per share of KT (the "KT Class A
 Common Stock"), shall be converted in the manner set forth in Section
 2.1(b) hereof.  KT shall be the surviving corporation in the KT Merger (the
 "Surviving Corporation") and shall thereupon become a wholly owned
 subsidiary of Parent.  From and after the KT Effective Time, the identity
 and separate existence of SubKT shall cease.

           (b)  In connection with the KT Merger, KT shall take such actions
 as may be necessary to cause Parent to reserve, prior to the KT Merger, a
 sufficient number of shares of class A common stock, par value $.01 per
 share, of Parent (the "Parent Common Stock"), to permit the issuance of
 shares of Parent Common Stock (i) to the holders of KT Class A Common Stock
 as of the KT Effective Time in accordance with the terms of this Agreement,
 and (ii) upon the exercise of KT Stock Options (as hereinafter defined)
 being assumed by Parent in accordance with Section 5.6 hereof.

           Section 1.2  The AH Merger.

           (a)  Upon the terms and subject to the conditions set forth in
 this Agreement and in accordance with the Delaware Limited Liability
 Company Act (the "DLLCA"), SubAH shall merge with and into AH (the "AH
 Merger," and together with the KT Merger, the "Mergers") at the AH
 Effective Time (as defined in Section 1.6) and each outstanding Class B
 membership unit of AH (the "AH Membership Units") shall be converted in the
 manner set forth in Section 2.2(b) hereof.  AH shall be the surviving
 limited liability company in the AH Merger  (the "Surviving LLC," and
 together with the Surviving Corporation, the "Surviving Subsidiaries") and
 shall thereupon become a wholly owned subsidiary of Parent.  From and after
 the AH Effective Time, the identity and separate existence of SubAH shall
 cease.

           (b)  In connection with the AH Merger, KT shall take such actions
 as may be necessary to cause Parent to reserve a sufficient number of
 shares of Parent Common Stock, prior to the AH Merger, to permit the
 issuance of shares of Parent Common Stock to the holders of the AH
 Membership Units as of the Effective Time in accordance with the terms of
 this Agreement.

           Section 1.3  KT Closing.  The closing of the KT Merger (the "KT
 Closing") will take place at a time and on a date to be specified by the
 parties (the "KT Closing Date") as soon as reasonably practicable following
 the satisfaction or waiver of the conditions set forth in Article VI (other
 than those conditions that by their nature are to be satisfied at the AH
 Closing, but which are reasonably expected by the parties to be so
 satisfied), unless another time or date is agreed to by the parties hereto.
 The KT Closing will be held at the offices of Skadden, Arps, Slate, Meagher
 & Flom LLP in New York, New York, unless another place is agreed to by the
 parties hereto.

           Section 1.4  AH Closing.  The closing of the AH Merger (the "AH
 Closing") will take place following the satisfaction or waiver of the
 conditions set forth in Article VI at a time and on a date to be specified
 by the parties (the "AH Closing Date"), which time and date shall be the
 later of four business days after the KT Closing or as soon as reasonably
 practicable thereafter, unless another time or date is agreed to by the
 parties hereto.  The AH Closing will be held at the offices of Skadden,
 Arps, Slate, Meagher & Flom LLP in New York, New York, unless another place
 is agreed to by the parties hereto.

           Section 1.5  KT Effective Time.  Subject to the provisions of
 this Agreement, as soon as practicable on or after the KT Closing Date,
 the parties shall file with the Secretary of State of the State of Delaware
 a certificate of merger (the "KT Certificate of Merger") executed in
 accordance with the relevant provisions of the DGCL and shall make all
 other filings or recordings required under the DGCL in order to effect the
 KT Merger.  The KT Merger shall become effective at such time as is
 specified in the KT Certificate of Merger and in accordance with the DGCL
 (the time at which the KT Merger has become fully effective being
 hereinafter referred to as the "KT Effective Time").

           Section 1.6  AH Effective Time.  Subject to the provisions of
 this Agreement, as soon as practicable on or after the AH Closing Date, the
 parties shall file with the Secretary of State of the State of Delaware a
 certificate of merger (the "AH Certificate of Merger") executed in
 accordance with the relevant provisions of the DLLCA and shall make all
 other filings required under the DLLCA to effect the AH Merger.  The AH
 Merger shall become effective at such time as is specified in the AH
 Certificate of Merger and in accordance with the DLLCA (the time at which
 the AH Merger has become fully effective being hereinafter referred to as
 the "AH Effective Time").  The time at which both Mergers have become fully
 effective is hereinafter referred to as the "Effective Time."

           Section 1.7  Effects of the Mergers.

           (a)  DGCL.  The KT Merger shall have the effects set forth in
 Section 259 of the DGCL.

           (b)  DLLCA.  The AH Merger shall have the effects set forth in
 Section 18-209 of the DLLCA.

           (c)  Names of Surviving Corporations.  The names of the Surviving
 Corporation and the Surviving LLC from and after the KT Effective Time and
 the AH Effective Time, respectively, shall be "Knight/Trimark, Inc." and
 "Knight Financial Products, L.L.C." respectively, until changed or amended
 in accordance with applicable Law (as hereinafter defined).

           (d)  Charter Documents.  (i) At the KT Effective Time, the
 Certificate of Incorporation and the Bylaws of KT, as in effect immediately
 prior to the KT Effective Time, shall be the Certificate of Incorporation
 and Bylaws, respectively, of the Surviving Corporation; provided, however,
 that from and after the KT Effective Time,  (x) paragraph (a) of Article
 FOURTH shall be amended and restated and shall be read in its entirety as
 follows:  "FOURTH:  The total number of shares of stock which the
 Corporation shall have authority to issue is 3,000 shares of capital stock,
 consisting of (i) 1,000 shares of class A common stock, par value $.01 per
 share (the "Class A Common Stock"), (ii) 1,000 shares of class B common
 stock, par value $.01 per share (the "Class B Common Stock" and, together
 with the Class A Common Stock, the "Common Stock"), and (iii) 1,000 shares
 of preferred stock, par value $.01 per share (the "Preferred Stock")";  and
 (y) a new Article TWELFTH shall be added thereto which shall be and read in
 its entirety as follows:  "TWELFTH:  Any act or transaction by or involving
 this Corporation that requires for its adoption under the GCL or this
 Amended and Restated Certificate of Incorporation the approval of the
 stockholders of this Corporation (other than the election or removal of
 directors of this Corporation) shall, pursuant to Section 251(g) of the
 GCL, require, in addition, the approval of the stockholders of
 Knight/Trimark Group, Inc., a Delaware corporation, or any successor
 thereto by merger, by the same vote that is required by the GCL and/or the
 Amended and Restated Certificate of Incorporation of this Corporation"; and
 (ii) at the AH Effective Time, the Certificate of Formation and the
 Agreement of Limited Liability Company of SubAH, as in effect immediately
 prior to the AH Effective Time, shall be the Certificate of Formation and
 Agreement of Limited Liability Company, respectively, of the Surviving LLC.

           Section 1.8  Directors.

           (a)  SubKT.  The directors of SubKT at the KT Effective Time
 shall be the directors of the Surviving Corporation until the next annual
 meeting of stockholders of the Surviving Corporation (or their earlier
 resignation or removal) and until their respective successors are duly
 elected and qualified, as the case may be.

           (b)  SubAH.  The managers of SubAH at the AH Effective Time shall
 be the managers of the Surviving LLC until their resignation or removal and
 until their respective successors are duly elected and qualified, as the
 case may be.

           Section 1.9  Parent Charter Documents and Name.  At the KT
 Effective Time, the Certificate of Incorporation and Bylaws of Parent shall
 be as set forth substantially in the form of Exhibit A and Exhibit B
 hereto, respectively, and the name of Parent shall be changed to
 "Knight/Trimark Group, Inc."


                                 ARTICLE II
              EFFECT OF THE MERGERS ON THE EQUITY SECURITIES OF
                           KT AND AH; CERTIFICATES

           Section 2.1  Effect on KT Stock and SubKT Stock.  As of the KT
 Effective Time, by virtue of the KT Merger and without any action on the
 part of SubKT, KT or the holders of any securities of SubKT or KT:

           (a)  Cancellation of Treasury Stock.  Each share of KT Class A
 Common Stock that is owned directly by KT (but not including any such
 shares owned by employee benefit or pension plans) shall automatically be
 cancelled and retired and shall cease to exist, and no consideration shall
 be delivered in exchange therefor.

           (b)  Conversion of KT Class A Common Stock.  Each issued and
 outstanding share of KT Class A Common Stock (other than shares to be
 cancelled in accordance with Section 2.1(a)) shall be converted into one
 (the "KT Merger Exchange Ratio") validly issued, fully paid and
 nonassessable share of Parent Common Stock (such consideration being
 referred to herein as the "KT Merger Consideration").  As of the KT
 Effective Time, all such shares of KT Class A Common Stock shall no longer
 be outstanding and shall automatically be cancelled and retired and shall
 cease to exist, and each certificate or certificates which immediately
 prior to the Effective Time represented outstanding shares of KT Class A
 Common Stock (the "KT Certificates") shall cease to represent such shares
 of KT Class A Common Stock and instead shall be deemed to be certificates
 ("Parent Certificates") representing the number of whole shares of Parent
 Common Stock into which such shares have been converted.

           (c)  Conversion of Common Stock of SubKT.  Each issued and
 outstanding share of common stock, par value $.01 per share, of SubKT shall
 be converted into one validly issued, fully paid and nonassessable share of
 common stock of Surviving Corporation.

           (d)  Cancellation of Parent Common Stock Owned by KT.  Each share
 of Parent Common Stock that is owned by KT immediately prior to the KT
 Effective Time shall automatically be cancelled and retired and shall cease
 to exist, and no consideration shall be delivered in exchange therefor.

           Section 2.2  Effect on AH Membership Units and SubAH Membership
 Interests.  As of the AH Effective Time, by virtue of the AH Merger and
 without any action on the part of SubAH, AH or the holders of any
 securities of SubAH or AH:

           (a)  Cancellation of Unissued Interests.  Each unissued AH
 Membership Unit shall automatically be cancelled and retired and shall
 cease to exist, and no consideration shall be delivered in exchange
 therefor.

           (b)  Conversion of AH Membership Units.  Subject to Section
 2.3(e), each issued and outstanding AH Membership Unit set forth in Section
 3.2(a)(i) of the AH Disclosure Schedule (as hereinafter defined in Article
 III) (other than membership units to be cancelled in accordance with
 Section 2.2(a)) shall be converted into such fraction (the "AH Merger
 Exchange Ratio") of a validly issued, fully paid and nonassessable share of
 Parent Common Stock (such consideration being referred to herein as the "AH
 Merger Consideration," and, collectively with the KT Merger Consideration,
 the "Merger Consideration") as determined in accordance with the next
 sentence.  The AH Merger Exchange Ratio shall be determined as follows: (i)
 if the Average Price (as defined below) is greater than or equal to
 $23.450, but less than or equal to $35.175, then the AH Merger Exchange
 Ratio will be the quotient determined by dividing 6.727 by the Average
 Price; (ii) if the Average Price is less than $23.450, then the AH Merger
 Exchange Ratio will be 0.287; and (iii) if the Average Price is greater
 than $35.175, then the AH Merger Exchange Ratio will be 0.191.  "Average
 Price" means the average (rounded to the nearest 1/10,000) of the closing
 prices on The Nasdaq Stock Market's National Market (the "NMS") as reported
 in The Wall Street Journal (national edition) (or if not reported thereby,
 any other authoritative source), of the KT Class A Common Stock for the ten
 consecutive trading days ending on the third trading day immediately prior
 to the KT Effective Time.  In determining the AH Merger Exchange Ratio
 pursuant to clause (i) as provided above, the final number will be rounded
 to three decimal places, rounding up from 0.0005.  Notwithstanding anything
 elsewhere herein to the contrary, the aggregate number of shares of Parent
 Common Stock to be issued to each holder of AH Membership Units shall be
 rounded to the nearest whole number of shares.  As of the AH Effective
 Time, all such AH Membership Units shall no longer be outstanding and shall
 automatically be cancelled and retired and shall cease to exist, and each
 holder of an AH Membership Unit immediately prior to the AH Effective Time
 shall cease to have any rights with respect thereto, except the right to
 receive Parent Certificates.

           (c)  Cancellation of AH Class A Membership Units.  Each issued
 and outstanding class A membership unit of AH (the "Class A Membership
 Units"), shall automatically be cancelled and retired and shall cease to
 exist, and no consideration shall be delivered in exchange therefor.

           (d)  Conversion of Membership Interests of SubAH.  Each issued
 and outstanding membership interest of SubAH shall be converted into one
 validly issued, fully paid and nonassessable membership interest of the
 Surviving LLC.

           Section 2.3  Exchange of Certificates.

           (a)  No Surrender of KT Certificates.  Until thereafter
 surrendered for transfer or exchange in the ordinary course, each
 outstanding stock certificate that, immediately prior to the KT Effective
 Time, evidenced shares of KT Class A Common Stock shall be deemed and
 treated for all corporate purposes to evidence the ownership of the number
 of shares of Parent Common Stock into which such shares of KT Class A
 Common Stock were converted pursuant to the provisions of Section 2.1(b).

           (b)  Exchange Agent.  As of the AH Effective Time, Parent shall
 enter into an agreement with such bank or trust company as may be
 designated by KT (the "Exchange Agent"), which shall provide that Parent
 shall deposit with the Exchange Agent as of the AH Effective Time, for the
 benefit of the holders of AH Membership Units, for exchange in accordance
 with this Article II, through the Exchange Agent, Parent Certificates
 representing the number of whole shares of Parent Common Stock issuable
 pursuant to Section 2.2(b) in exchange for outstanding AH Membership Units.

           (c)  Exchange Procedures.  At the AH Effective Time and subject
 to the provisions of Section 2.3(g) below, each holder of AH Membership
 Units whose AH Membership Units were converted into AH Merger Consideration
 pursuant to Section 2.2(b) hereof shall receive from the Exchange Agent a
 Parent Certificate representing that number of whole shares of Parent
 Common Stock which such holder has the right to receive pursuant to the
 provisions of Section 2.2(b) hereof; provided, that each such holder shall
 execute an acknowledgment, in form and substance reasonably satisfactory to
 Parent, stating that receipt of such Parent Certificate by such holder
 shall be deemed in full satisfaction of the obligations of Parent to such
 holder under Article II.  Until surrendered for exchange as contemplated by
 this Section 2.3, each AH Membership Unit shall be deemed at any time after
 the AH Effective Time to represent only the right to receive upon such
 surrender, Parent Certificates representing the number of whole shares of
 Parent Common Stock into which the AH Membership Units have been converted.

           (d)  No Further Ownership Rights in AH Membership Units.  All
 shares of Parent Common Stock issued upon the surrender for exchange of AH
 Membership Units in accordance with the terms of this Article II shall be
 deemed to have been issued in full satisfaction of all rights pertaining to
 the AH Membership Units, and there shall be no further registration of
 transfers on the transfer books of the Surviving LLC of the AH Membership
 Units which were outstanding immediately prior to the AH Effective Time.
 If, after the AH Effective Time, AH Membership Units are presented to the
 Surviving LLC or the Exchange Agent for any reason, they shall be cancelled
 and exchanged as provided in this Article II, except as otherwise provided
 by Law.

           (e)  No Fractional Shares.  No Parent Certificates or scrip
 representing fractional shares of Parent Common Stock shall be issued upon
 the surrender for exchange of AH Membership Units, no dividend or
 distribution of Parent shall relate to such fractional share interests, and
 such fractional share interests will not entitle the owner thereof to vote
 or to any rights of a stockholder of Parent.

           (f)  No Liability.  None of Parent, KT, AH or the Exchange Agent
 shall be liable to any person in respect of any shares of Parent Common
 Stock (or dividends or distributions with respect thereto), in each case
 delivered to a public official pursuant to any applicable abandoned
 property, escheat or similar Law.

           (g)  Escrow Indemnity Agreement.  Each of the Members hereby
 agrees to cause the Exchange Agent (by written instruction and such other
 actions reasonably requested by the Exchange Agent and the Escrow Agent) to
 deposit, at the AH Closing, with an escrow agent reasonably acceptable to
 Parent and AH (the "Escrow Agent"), on behalf of the Members, a number of
 shares of Parent Common Stock equal to 10% of the aggregate number of
 shares of Parent Common Stock issuable to the Members pursuant to Section
 2.2 hereof (the "Escrow Shares"), which Escrow Shares shall be held in an
 escrow account in accordance with the terms of an escrow agreement between
 the Members, Parent and the Escrow Agent, substantially in the form
 attached as Exhibit C hereto (the "Escrow Indemnity Agreement").  The
 obligations of each of the Members to cause the deposit of shares of Parent
 Common Stock as Escrow Shares shall be pro rata to the number of shares of
 Parent Common Stock to which such Member (directly or through any
 affiliated entity) is entitled as a result of the AH Merger.  The Escrow
 Shares will secure the obligations of the Members pursuant to Article VIII.


                                 ARTICLE III
            REPRESENTATIONS AND WARRANTIES OF AH AND THE MEMBERS

           Except as set forth in the disclosure schedule delivered by AH
 prior to the execution of this Agreement (the "AH Disclosure Schedule")
 making reference to the particular section or subsection of this Agreement
 to which an exception is being taken, AH and each of the Members hereby
 represent and warrant, jointly and severally, to KT, as of the date hereof
 and as of the AH Closing Date, as follows:

           Section 3.1  Organization, Qualification, Etc.

           (a)  AH is a limited liability company duly organized, validly
 existing and in good standing (or other equivalent status) under the laws
 of the jurisdiction of its organization and has the limited liability
 company power and authority to own, operate and lease all of its properties
 and assets and to carry on its business as it is now being conducted or
 presently proposed to be conducted and is duly qualified to do business and
 is in good standing (or other equivalent status) in each jurisdiction in
 which the ownership, operation or leasing of its properties or assets or
 the conduct of its business requires such qualification, except for
 jurisdictions in which the failure to be so qualified or in good standing
 (or other equivalent status) could not reasonably be expected, individually
 or in the aggregate, to have a Material Adverse Effect on AH.  As used in
 this Agreement, any reference to any state of facts, event, change or
 effect having a "Material Adverse Effect" on or with respect to AH, means
 such state of facts, event, change or effect that, individually or in the
 aggregate, has had or could reasonably be expected to have a material
 adverse effect on the business, assets, results of operations or condition
 (financial or otherwise) of AH and its Subsidiaries (as hereinafter
 defined), taken as a whole (except for any state of facts, event, change or
 effect (i) relating to general economic conditions in the geographic areas
 in which AH and its Subsidiaries operate or invest or (ii) similarly
 affecting persons in the industries in which AH and its Subsidiaries
 operate), or that could reasonably be expected to materially impair the
 ability of AH or any of the Members to perform its respective obligations
 under this Agreement or consummate the Mergers and the other transactions
 contemplated hereby.  AH has made available to KT true, complete and
 correct copies of AH's Certificate of Formation and Amended and Restated
 Operating Agreement (the "AH Organizational Documents"), which AH
 Organizational Documents are in full force and effect.

           (b)  Each of AH's Subsidiaries is a corporation or limited
 liability company duly organized, validly existing and in good standing (or
 other equivalent status) under the laws of its jurisdiction of
 incorporation or organization, has the power and authority to own, operate
 and lease its properties and to carry on its business as it is now being
 conducted or presently proposed to be conducted, and is duly qualified to
 do business and is in good standing (or equivalent status) in each
 jurisdiction in which the ownership, operation or leasing of its properties
 or assets or the conduct of its business requires such qualification,
 except for jurisdictions in which the failure to be so qualified or in good
 standing (or other equivalent status) could not reasonably be expected,
 individually or in the aggregate, to have a Material Adverse Effect on AH.
 AH has made available to KT true, complete and correct copies of the
 certificate of incorporation, bylaws or other similar governing documents
 for each of AH's Subsidiaries, which organizational documents are in full
 force and effect.

           (c)  All of the issued and outstanding shares of capital stock
 of, or other voting securities or ownership interests in, AH's Subsidiaries
 have been validly issued and are fully paid and nonassessable and are owned
 of record and beneficially by AH, directly or indirectly, free and clear of
 all liens, encumbrances, security agreements, equities, options, charges,
 pledges, mortgages or restrictions of any kind whatsoever ("Encumbrances").
 There are no (i) securities of AH or any of its Subsidiaries convertible
 into or exchangeable or exercisable for shares of capital stock or other
 voting securities or ownership interests in any of AH's Subsidiaries, (ii)
 warrants, calls, options or other rights to acquire from AH or any of its
 Subsidiaries, or any obligations of AH or any of its Subsidiaries to issue,
 any capital stock, voting securities or other ownership interests in, or
 any securities convertible into or exchangeable or exercisable for, any
 capital stock, voting securities or ownership interests in, any of AH's
 Subsidiaries, or (iii) obligations of AH or any of its Subsidiaries to
 repurchase, redeem or otherwise acquire any outstanding securities of AH's
 Subsidiaries or to issue, deliver or sell, or cause to be issued, delivered
 or sold, any such securities.

           (d)  Section 3.1(d) of the AH Disclosure Schedule sets forth a
 list of all Subsidiaries of AH, their respective jurisdictions of
 organization and the percentage equity ownership of AH (direct or indirect)
 in each of them.  Except as set forth in Section 3.1(d) of the AH
 Disclosure Schedule and other than securities acquired or investments made
 in connection with trading activities or investments in capital market
 securities, in each case, in the ordinary course of business consistent
 with past practice, AH and its Subsidiaries do not own any securities of,
 or have any debt or equity investment in, or loans outstanding to, any
 person (other than the Subsidiaries of AH).  AH and its Subsidiaries are
 not subject to any contractual obligation under which any of them may be
 required to advance or contribute capital to, or make any loan to, any
 person or entity.

           Section 3.2  Membership Units.

           (a) AH has members holding the respective (i) AH Membership Units
 and (ii) Class A Membership Units (collectively, the "Membership Units")
 set forth in Section 3.2(a)(i) of the AH Disclosure Schedule.  None of such
 Membership Units are represented in physical form by any certificate or
 other similar instrument.  The Membership Units are validly issued, fully
 paid and nonassessable and free of preemptive rights.  Except as set forth
 in Section 3.2(a)(ii) of the AH Disclosure Schedule, there are no
 membership or limited liability company interests or other equity
 securities or any security convertible into or exchangeable for any such
 membership or limited liability company interests or other equity
 securities of AH issued and outstanding; there are no issued and
 outstanding options, warrants or rights to purchase or acquire any
 membership or limited liability company interests or other equity
 securities of AH or any security convertible into or exchangeable for any
 such membership or limited liability company interests or other equity
 securities of AH; and there are no contracts, commitments, understandings,
 arrangements or restrictions by which AH is bound to issue additional
 membership or limited liability company interests or other equity
 securities or options, warrants or rights to purchase or acquire any
 additional membership or limited liability company interests or other
 equity securities or any security convertible into or exchangeable for any
 such membership or limited liability company interests or other equity
 securities of AH.

           (b)  The Members own, beneficially and of record, 100% of the
 Membership Units free and clear of all Encumbrances.

           Section 3.3  Authority Relative to this Agreement.

           (a)  AH has the limited liability company power and authority to
 enter into this Agreement and to carry out its obligations hereunder.  The
 execution, delivery and performance of this Agreement and the consummation
 of the transactions contemplated hereby have been duly and validly
 authorized by the Members and no other limited liability company
 proceedings on the part of AH are necessary to authorize this Agreement or
 the consummation of the transactions contemplated hereby.  This Agreement
 has been duly and validly executed and delivered by AH and each of the
 Members and, assuming this Agreement constitutes a valid and binding
 agreement of the other parties hereto, this Agreement constitutes a valid
 and binding agreement of AH and each of the Members, enforceable against AH
 and each of the Members in accordance with its terms (except insofar as
 enforceability may be limited by applicable bankruptcy, insolvency,
 reorganization, moratorium or similar laws affecting creditors' rights
 generally or by principles governing the availability of equitable
 remedies).

           Section 3.4  Non-Contravention; Consents and Approvals.

           (a)  None of the execution, delivery or performance of this
 Agreement by AH and each of the Members or the consummation by AH and each
 of the Members of the transactions contemplated hereby will (i) violate the
 AH Organizational Documents or the certificate of incorporation, the bylaws
 or other similar governing documents of any Subsidiaries of AH or any of
 the Private Funds (as defined in Section 3.21(h) below), (ii) except for
 all third party consents and approvals required to be obtained under any
 note, bond, mortgage, deed of trust, security interest, indenture, lease,
 license, contract, agreement, exchange membership, exchange allocation,
 plan or other instrument or obligation to which AH, any of its
 Subsidiaries, any of the Private Funds or any Member is a party or by which
 any of them or any of their respective properties or assets may be bound
 (the "AH Agreements") prior to the consummation of the transactions
 contemplated by this Agreement the failure of which to obtain could
 reasonably be expected, individually or in the aggregate, to have a
 Material Adverse Effect on AH (the "Required Third Party Consents"), result
 in the violation or breach of, or constitute (with or without due notice or
 lapse of time or both) a default (or give rise to any right of termination,
 cancellation, vesting, payment, exercise, acceleration, suspension or
 revocation) under, any of the provisions of any AH Agreement, (iii) except
 for all notices to, filings and registrations with, and permits,
 authorizations, consents and approvals of, Governmental Entities (as
 defined in Section 3.8(i) below) required to be made or obtained from
 Governmental Entities prior to the consummation of the transactions
 contemplated by this Agreement the failure of which to so make or obtain
 could reasonably be expected, individually or in the aggregate, to have a
 Material Adverse Effect on AH (the "Required Statutory Approvals"), violate
 any order, writ, injunction, decree, judgment, permit, license, statute,
 law, ordinance, rule or regulation ("Law") of any Governmental Entity
 applicable to AH, any of its Subsidiaries, any of the Private Funds or any
 Member or any of their respective properties or assets, or (iv) result in
 the creation or imposition of any Encumbrance on any asset of AH, any of
 its Subsidiaries, any of the Private Funds or any Member, except in the
 case of clauses (ii), (iii) and (iv) for violations, breaches, defaults,
 terminations, cancellations, accelerations or creations which could not
 reasonably be expected, individually or in the aggregate, to have a
 Material Adverse Effect on AH.

           (b)  Section 3.4(b)(i) of the AH Disclosure Schedule sets forth a
 list of all of the Required Third Party Consents.  Section 3.4(b)(ii) of
 the AH Disclosure Schedule sets forth a list of all of the Required
 Statutory Approvals.

           Section 3.5  Financial Statements; Financial Condition.

           (a)  AH has previously delivered to KT true and complete copies
 of the financial statements of AH and/or its predecessors (the "AH
 Financial Statements") consisting of (i) an audited consolidated statement
 of financial condition of AH at December 31, 1998, (ii) an audited
 consolidated statement of income and statement of cash flows of AH for the
 12 months ended December 31, 1998, (iii) unaudited statements of financial
 condition at December 31, 1997 for each of Nu Twins, L.L.C., Tarmachan
 Capital Management, Inc., Tarmachan Capital Co., Laboratory for
 Computerized Trading LLC and Arbitrade UK Limited, and at September 30,
 1999 for each of Deephaven Capital Management LLC, Deephaven Capital LLC,
 Arbitrade, L.L.C., Arbitrade UK Limited, Deephaven Investment Advisers LLC
 and Laboratory for Computerized Trading LLC, (iv) unaudited statements of
 income for the 12 months ended December 31, 1997 for each of Nu Twins,
 L.L.C., Tarmachan Capital Management, Inc., Tarmachan Capital Co.,
 Laboratory for Computerized Trading LLC and Arbitrade UK Limited; and (v)
 an unaudited consolidated statement of income of AH for the nine months
 ended September 30, 1999.  All of the audited AH Financial Statements
 delivered to KT (including all notes and schedules contained therein or
 annexed thereto) have been prepared in accordance with GAAP consistently
 applied with past practices, and all of the unaudited AH Financial
 Statements delivered to KT (including all notes and schedules contained
 therein or annexed thereto) have been prepared on a basis consistent with
 the accounting principles used in the preparation of the audited AH
 Financial Statements.  All of the AH Financial Statements delivered to KT
 (including all notes and schedules contained therein or annexed thereto)
 are consistent with the books and records of AH and its Subsidiaries, and
 fairly present in all material respects the assets, liabilities and
 financial condition, the results of operations and cash flows of the
 relevant entities as of the dates and for the years and periods indicated.
 The AH Financial Statements disclose all material changes in accounting
 principles and practices adopted by the relevant entities during the
 periods covered by such AH Financial Statements.

           (b)  The total Net Assets (as defined below) reflected on the
 unaudited combined statement of financial condition of AH as of September
 30, 1999 are, and the total Net Assets reflected on the unaudited combined
 statement of financial condition of AH as of the AH Closing Date will be,
 at least $38.0 million.  "Net Assets" shall be calculated by subtracting
 total liabilities from total assets.  Each of the statements of financial
 condition pursuant to which such calculations were made or will be made, as
 applicable, was or will be prepared in accordance with GAAP consistently
 applied with past practices and in a manner consistent with the audited
 statement of financial condition of AH as of December 31, 1998, subject to
 adjustment as set forth in Section 3.5(b) of the AH Disclosure Schedule.

           Section 3.6  Environmental Matters.

           (a)  None of AH or any of its Subsidiaries is required to obtain
 any licenses, permits, authorizations, approvals and consents from
 Governmental Entities under any applicable Environmental Law (as defined
 below) in respect of its business, properties, assets and operations,
 except for such failures to obtain as could not reasonably be expected,
 individually or in the aggregate, to have a Material Adverse Effect on AH.
 Each of AH and its Subsidiaries is in compliance with all applicable
 Environmental Laws, except for such exceptions as could not reasonably be
 expected, individually or in the aggregate, to have a Material Adverse
 Effect on AH.

           (b)  There is no Environmental Claim (as defined below) filed,
 pending, or to the  knowledge of AH, threatened or in process, against AH
 or any of its Subsidiaries or any person whose liability for such
 Environmental Claim AH or any of its Subsidiaries has retained or assumed
 either contractually or by operation of Law, that could reasonably be
 expected, individually or in the aggregate, to have a Material Adverse
 Effect on AH.

           (c)  Except as set forth in Section 3.6(c) of the AH Disclosure
 Schedule, to the knowledge of AH, no Encumbrances have arisen under or
 pursuant to any Environmental Law on any property, site or facility owned,
 operated or leased by AH or any of its Subsidiaries, except for such
 Encumbrances which could not reasonably be expected, individually or in the
 aggregate, to have a Material Adverse Effect on AH, and no action of any
 Governmental Entity has been taken or, to the knowledge of the Company, is
 threatened which could subject any of such properties to such Encumbrances,
 except for such action which could not reasonably be expected, individually
 or in the aggregate, to have a Material Adverse Effect on AH.

           (d)  As used in this Agreement:

                (i)  "Environmental Claim" means any claim, action, cause of
      action, order, investigation or notice (written or oral) by any person
      alleging potential or actual liability (including, without limitation,
      potential or actual liability for investigation, evaluation, cleanup,
      removal actions, remedial actions, response actions, natural resources
      damages, property damages, personal injuries or penalties) arising out
      of, based on or resulting from any Environmental Law, including any
      claim under CERCLA, and shall include any request for information
      under CERCLA or any comparable foreign, state or local Law.

                (ii) "Environmental Law" means any Law relating to (a) the
      environment or pollution, environmental matters, the protection of the
      environment, or the protection of human health and safety from
      environmental concerns, (b) actual or threatened emissions,
      discharges, or releases of pollutants, contaminants, chemicals or
      solid, industrial, toxic or hazardous substances, wastes or
      constituents into the environment, and (c) the presence, manufacture,
      processing, distribution, use, treatment, storage, disposal, transport
      or handling of Hazardous Materials.

                (iii)     "Hazardous Materials" means (a) any petroleum or
      petroleum products and radioactive materials, (b) any chemicals,
      constituents, materials, or substances defined or included in the
      definition of "hazardous substances," "hazardous wastes," "hazardous
      materials," "extremely hazardous substances," "toxic substances" and
      related materials, as such materials are defined in any Environmental
      Law, and (c) any other chemical, material or substance, exposure to
      which is prohibited, limited or regulated by any Governmental Entity.

           Section 3.7  Employee Benefit Plans; ERISA.

           (a)  Except as could not reasonably be expected, individually or
 in the aggregate, to have a Material Adverse Effect on AH, (i) all Employee
 Benefit Plans (as defined below) (other than any Employee Benefit Plan that
 is a "multiemployer plan" within the meaning of Section 3(37) of ERISA (a
 "Multiemployer Plan")) are in material compliance with all applicable
 requirements of Law, including ERISA and the Code, and (ii) neither AH nor
 any of its Subsidiaries nor any ERISA Affiliate (as defined below) has any
 liabilities or obligations with respect to any such Employee Benefit Plans,
 whether accrued, contingent or otherwise, that are not otherwise reflected
 on the AH Financial Statements, nor to the knowledge of AH, are any such
 liabilities or obligations expected to be incurred.  The execution and
 delivery of, and performance of the transactions contemplated by this
 Agreement will not (either alone or upon the occurrence of any additional
 or subsequent events) constitute an event under any Employee Benefit Plan
 that will or may result in acceleration, forgiveness of indebtedness,
 vesting, distribution, increase in benefits or obligation to fund benefits
 with respect to any employee.  The only severance agreements or severance
 policies applicable to AH or any of its Subsidiaries are the agreements and
 policies set forth in Section 3.7(a) of the AH Disclosure Schedule.

           (b)  With respect to each of its Plans, AH has heretofore made
 available to KT complete and correct copies of each of the following
 documents, as applicable: (i) a copy of the Plan (as defined below) and any
 amendments thereto; (ii) a copy of the most recent annual report; (iii) a
 copy of the most recent actuarial report; (iv) a copy of the most recent
 Summary Plan Description and all material modifications; (v) a copy of the
 trust or other funding agreement and any amendments thereto; and (vi) the
 most recent determination letter received from the Internal Revenue Service
 (the "IRS") with respect to each Plan that is intended to be qualified
 under Section 401 of the Code.

           (c)  Section 3.7(c) of the AH Disclosure Schedule sets forth a
 list of each employee of AH or any of its Subsidiaries who is a party to
 any agreement (whether written or oral) with respect to such person's
 employment by AH or any of its Subsidiaries for annual compensation in
 excess of $120,000.  AH has made available to KT a complete and correct
 copy of each such written employment agreement and a complete and correct
 written summary of each such oral agreement.

           (d)  None of the Employee Benefit Plans is either (i) subject to
 Title IV of ERISA, or (ii) a money purchase plan, and neither AH, any of
 its Subsidiaries nor any ERISA Affiliate has maintained, contributed to or
 had an obligation to contribute to an employee benefit plan that is subject
 to Title IV of ERISA within the six year period preceding the date of this
 Agreement.  None of the Employee Benefit Plans is a Multiemployer Plan.
 Each of the Employee Benefit Plans that is intended to be "qualified"
 within the meaning of Section 401(a) of the Code is so qualified and the
 trusts maintained thereunder are exempt from taxation under Section 501(a)
 of the Code.  Except as set forth in Section 3.7(d) of the AH Disclosure
 Schedule, no Employee Benefit Plan provides benefits, including without
 limitation death or medical benefits (whether or not insured), with respect
 to current or former employees after retirement or other termination of
 service (other than coverage mandated by applicable Law or benefits, the
 full cost of which is borne by the current or former employee).  There are
 no material pending or threatened claims by or on behalf of any Employee
 Benefit Plan, by any employee or beneficiary covered under any such
 Employee Benefit Plan, or otherwise involving any such Employee Benefit
 Plan (other than routine claims for benefits).  No prohibited transaction
 has occurred with respect to any Employee Benefit Plan that would result,
 directly or indirectly, in the imposition of an excise Tax or other
 liability under the Code or ERISA, except for such a Tax or other liability
 that could not reasonably be expected, individually or in the aggregate, to
 have a Material Adverse Effect on AH.  Except as could not reasonably be
 expected, individually or in the aggregate, to have a Material Adverse
 Effect on AH, with respect to each foreign Plan:  (i) all amounts required
 to be reserved on account of each foreign Plan have been so reserved in
 accordance with reasonable accounting practices prevailing in the country
 where such foreign Plan is established and (ii) each foreign Plan required
 to be registered with a Governmental Entity has been registered, has been
 maintained in good standing with the appropriate Governmental Entities, and
 has been maintained and operated in accordance with its terms and
 applicable Law.

           (e)  Except as set forth in Section 3.7(e) of the AH Disclosure
 Schedule, no director or officer or other employee of AH or any of its
 Subsidiaries will become entitled to any termination, retirement, severance
 or similar payment, benefit or enhanced or accelerated benefit (including
 any acceleration of vesting or lapse of restrictions, repurchase rights or
 obligations with respect to any benefit under any equity plan or incentive
 or compensation plan or arrangement) as a result of the transactions
 contemplated by this Agreement (either standing alone or in conjunction
 with any additional or subsequent events).

           (f)  Any amount or other entitlement that could be received
 (whether in cash or property or the vesting of property) as a result of any
 of the transactions contemplated by this Agreement by any employee, officer
 or director of AH or any of its affiliates who is a "disqualified
 individual" (as such term is defined in proposed Treasury Regulation
 Section 1.280G-1) under any employee benefit plan or other compensation
 arrangement currently in effect would not be characterized as an "excess
 parachute payment" or a "parachute payment" (as such terms are defined in
 Section 280G(b)(1) of the Code).

           (g)  As used in this Agreement:

                (i)  "Employee Benefit Plan" means any material Plan entered
      into, established, maintained, sponsored, contributed to or required
      to be contributed to by AH or any of its Subsidiaries or ERISA
      Affiliates for the benefit of the current or former employees or
      directors of AH or any of its Subsidiaries and existing, or under
      which AH or any of its Subsidiaries or ERISA Affiliates has any
      liabilities on the date of this Agreement or at any time subsequent
      thereto and on or prior to the Effective Time;

                (ii) "Plan" means any employment, bonus, incentive
      compensation, deferred compensation, pension, profit sharing,
      retirement, equity purchase, equity option, equity ownership, equity
      appreciation rights, phantom equity, leave of absence, layoff,
      vacation, day or dependent care, legal services, cafeteria, life,
      health, medical, accident, disability, worker's compensation or other
      insurance, severance, separation, termination, change of control or
      other benefit plan, agreement, practice policy, program or arrangement
      of any kind, whether written or oral, including, but not limited to,
      any "employee benefit plan" within the meaning of Section 3(3) of the
      Employee Retirement Income Security Act of 1974, as amended, and the
      rules and regulations thereunder ("ERISA"); and

                (iii)     "ERISA Affiliate" means, with respect to AH, any
      entity, trade or business that is a member of the same controlled
      group as AH (within the meaning of Sections 414(b), (c), (m) or (o) of
      the Code).

           Section 3.8  Tax Matters.  Except as set forth in Section 3.8 of
 the AH Disclosure Schedule:

            (a)  All income and other material Tax Returns (as defined
 below), which are required to be filed by AH or its Subsidiaries have been
 timely filed (giving effect to any extensions) and all such Tax Returns are
 true, complete and correct.  All Taxes shown on such Tax Returns as owed by
 AH or any of the Subsidiaries or claimed to be owed by AH or any of the
 Subsidiaries by any Governmental Entity for any taxable period (whether or
 not shown on any Tax Return) have been timely paid in full or are being
 contested in good faith by appropriate proceedings (and for which the
 relevant entity has set aside adequate reserves on its financial statements
 in accordance with GAAP).

           (b)  Each of AH and each of its Subsidiaries has complied in all
 material respects with all applicable Laws relating to the payment and
 withholding of Taxes (including, without limitation, withholding of Taxes
 pursuant to Sections 1441 and 1442 of the Code or similar provisions under
 any foreign laws) and has, within the time and in the manner prescribed by
 applicable Laws, withheld from employee wages or other compensation and
 from any payments to independent contractors and paid over to the proper
 Governmental Entity all amounts required to be so withheld and paid over
 under all applicable Laws.

           (c)  (i)  No deficiencies for any Taxes have been threatened,
 proposed, asserted or assessed against AH or any of its Subsidiaries, (ii)
 no Governmental Entity is conducting or proposing to conduct an audit with
 respect to Taxes of or any Tax Return required to be filed with respect to
 AH or any of its Subsidiaries, (iii) neither AH nor any of its Subsidiaries
 is a party to any agreement or arrangement to allocate, share or indemnify
 another party for Taxes, (iv) there are no Liens for Taxes upon the assets
 of AH or any of its Subsidiaries, except for Statutory Liens for Taxes not
 yet due, (v) no jurisdiction where either AH or any of its Subsidiaries
 does not file a Tax Return has asserted or otherwise made a claim that AH
 or any of its Subsidiaries is required to file a Tax Return for such
 jurisdiction, and (vi) no power of attorney has been granted by or with
 respect to AH or any of its Subsidiaries with respect to any matter
 relating to Taxes.

           (d)  AH and each of its Subsidiaries is (and, during its entire
 existence, has been) treated as either (i) an entity the separate existence
 of which is disregarded for United States federal income tax purposes or
 (ii) a domestic partnership for United States federal income tax purposes.
 No Tax Return has been filed in any manner that is inconsistent with such
 treatment.

           (e)  None of AH or any of its Subsidiaries has requested any
 extension of time within which to file any Tax Return in respect of any
 taxable year which has not since been filed, and no outstanding waivers or
 comparable consents regarding the application of the statute of limitations
 with respect to any Taxes or Tax Returns has been given by or on behalf of
 AH or any of its Subsidiaries.

           (f)  The reserves for Taxes (determined in accordance with GAAP
 consistently applied) reflected in the most recent balance sheet included
 in the AH Financial Statements are adequate for the payment of all Taxes
 incurred or which may be incurred by AH or any of its Subsidiaries through
 the date of this Agreement.  Since the date of the most recent balance
 sheet included in the AH Financial Statements, none of AH or any of its
 Subsidiaries has incurred any liability for Taxes other than in the
 ordinary course of business.

           (g)  Each of the Members is a United States Person (as defined in
 Section 7701(a)(30) of the Code).

           (h)  AH and each of its Subsidiaries has previously delivered or
 made available to KT complete and accurate copies of each of (i) all audit
 reports, letter rulings, technical advice memoranda and similar documents
 issued by a Governmental Entity relating to Taxes of, or with respect to,
 AH or any of its Subsidiaries, (ii) all income Tax Returns, and those
 state, local and foreign income Tax Returns filed by AH or any of its
 Subsidiaries (or on their behalf) and (iii) any closing agreements entered
 into by AH or any of its Subsidiaries with any Governmental Entity.  AH
 will deliver to KT all materials with respect to the foregoing for all
 matters arising after the date of this Agreement.

           (i)  "Governmental Entity" means any (i) nation, state, county,
 city, town, village, district, or other jurisdiction of any nature; (ii)
 federal, state, local, municipal, foreign or other government; (iii)
 governmental or quasi-governmental authority of any nature (including any
 governmental agency, branch, department, official, or entity and any court
 or other tribunal); or (iv) body exercising, or entitled to exercise, any
 governmentally derived administrative, executive, judicial, legislative,
 police, regulatory, or taxing authority or power of any nature.

           (j)  "Taxes" means any federal, state, local or foreign net
 income, gross income, receipts, windfall profit, severance, property,
 production, sales, use, license excise, franchise, employment, payroll,
 withholding, alternative or add-on minimum, ad valorem, transfer, stamp or
 environmental tax, or any other tax, custom, duty, governmental fee or
 other like assessment or charge of any kind whatsoever, together with any
 interest or penalty, addition to tax or additional amount imposed by any
 Governmental Entity.

           (k)  "Tax Returns" means all returns, reports, or statements
 required to be filed with any Governmental Entity with respect to any Tax
 (including any schedules or attachments thereto), including, without
 limitation, any consolidated, unitary or similar return, information
 return, claim for refund, amended return or declaration of estimated Tax.

           Section 3.9  No Undisclosed Material Liabilities.  There are no
 liabilities, obligations or commitments of AH or any Subsidiary of AH of
 any kind whatsoever, whether accrued, contingent, absolute, determined or
 determinable, other than:

           (a)  liabilities the amounts of which could not reasonably be
 expected, individually or in the aggregate, to have a Material Adverse
 Effect on AH;

           (b)  liabilities the amounts of which are expressly disclosed in
 the AH Financial Statements or are set forth in Section 3.9(b) of the AH
 Disclosure Schedule; and

           (c)  liabilities under or arising as a result of this Agreement.

           Section 3.10  Labor Relations.  Except as set forth in Section
 3.10 of the AH Disclosure Schedule, (i) neither AH nor any of its
 Subsidiaries is a party to any collective bargaining agreement, (ii) no
 labor organization or group of employees of AH (or any of its Subsidiaries)
 has made a pending demand for recognition or certification, and there are
 no representation or certification proceedings or petitions seeking a
 representation proceeding presently pending or, to the knowledge of AH,
 threatened to be brought or filed, with the National Labor Relations Board
 or any other labor relations tribunal or authority, and (iii) in the past
 five years there have not been any, and, to the knowledge of AH, there are
 no, organizing activities, strikes, work stoppages, slowdowns, lockouts,
 material arbitrations or material grievances, or other material labor
 disputes pending or, to the knowledge of AH, threatened against or
 involving AH or any of its Subsidiaries.

           Section 3.11  Permits.  Each of AH, its Subsidiaries and the
 Private Funds is in possession of all franchises, grants, authorizations,
 licenses, permits, easements, variances, exceptions, consents,
 certificates, approvals and orders of any Governmental Entity necessary for
 AH, any of its Subsidiaries or any of the Private Funds to own, lease and
 operate its properties or to carry on its business as it is now being or is
 proposed to be conducted (collectively, the "AH Permits"), except where the
 failure to have, or the suspension or cancellation of, any of the AH
 Permits, could not reasonably be expected, individually or in the
 aggregate, to have a Material Adverse Effect on AH, and no suspension or
 cancellation of any of the AH Permits is pending or, to the knowledge of
 AH, threatened, except where the failure to have, or the suspension or
 cancellation of, any of the AH Permits could not reasonably be expected,
 individually or in the aggregate, to have a Material Adverse Effect on AH.
 Neither AH nor any of its Subsidiaries or any of the Private Funds is in
 conflict with, or in default or violation of, any AH Permits, except for
 any such conflicts, defaults or violations which, could not reasonably be
 expected, individually or in the aggregate, to have a Material Adverse
 Effect on AH.

           Section 3.12  Absence of Certain Changes or Events.  Except as
 set forth  in Section 3.12 of the AH Disclosure Schedule, since December
 31, 1998,  AH and each of its Subsidiaries and each of the Private Funds
 have conducted their businesses in the ordinary course and in a manner
 consistent with past practice and, since such date, except as expressly
 permitted by Section 5.1(A) of this Agreement with respect to clauses (c-i)
 below there has not been:

           (a)  any Material Adverse Effect on AH;

           (b)  any damage, destruction or other casualty loss with respect
 to any asset or property owned, leased or otherwise used by AH or any of
 its Subsidiaries, whether or not covered by insurance, which damage,
 destruction or loss could reasonably be expected, individually or in the
 aggregate, to have a Material Adverse Effect on AH;

           (c)  any material change by AH in its or any of its Subsidiaries'
 or any of the Private Funds' accounting methods, principles or practices,
 except as required by GAAP or by applicable Law;

           (d)  any redemption, purchase or other acquisition of any of AH's
 securities;

           (e)  any increase in the compensation or benefits or
 establishment of any bonus, insurance, severance, deferred compensation,
 pension, retirement, profit sharing, option (including, the granting of
 options or performance awards), or other employee benefit plan, or any
 other increase in the compensation payable or to become payable to any
 executive officers of AH or any of its Subsidiaries, in each case other
 than (i) as required by applicable Law and (ii) annual increases in the
 ordinary course of business consistent with past practice;

           (f)  (i) any incurrence or assumption by AH or any of its
 Subsidiaries or any of the Private Funds of any indebtedness for borrowed
 money or (ii) any guarantee, endorsement or other incurrence or assumption
 of any material liability (whether directly, contingently or otherwise) by
 AH or any of its Subsidiaries or any of the Private Funds for the
 obligations of any other person (other than any wholly owned Subsidiary),
 in each case other than in the ordinary course of business consistent with
 past practice;

           (g)  any creation or assumption by AH or any of its Subsidiaries
 or any of the Private Funds of any Encumbrance on any material asset of AH
 or any of its Subsidiaries or any of the Private Funds, other than in the
 ordinary course of business consistent with past practice;

           (h)  any making of any loan, advance or capital contribution to,
 or investment in, any person or entity by AH or any of its Subsidiaries or
 any of the Private Funds, other than in connection with trading activities
 or investments in capital market securities, in each case,  in the ordinary
 course of business consistent with past practice; or

           (i)  (i) any AH Agreements entered into by AH or any of its
 Subsidiaries relating to any material acquisition or disposition of any
 assets or business, or (ii) any modification, amendment, assignment or
 termination of or relinquishment by AH or any of its Subsidiaries of any
 rights under any other material AH Agreement (including any insurance
 policy naming it as a beneficiary or a loss payable payee) other than
 transactions, commitments, contracts or agreements in the ordinary course
 of business consistent with past practice or those contemplated by this
 Agreement.

           Section 3.13  No Defaults.  Except as set forth in Section 3.13
 of the AH Disclosure Schedule, there is no AH Agreement that is material to
 the business, financial condition or results of operations of AH and its
 Subsidiaries taken as a whole.  Neither AH nor any of its Subsidiaries is
 and, to the knowledge of AH, none of the other parties to such AH
 Agreements are, in violation of or in default under (nor does there exist
 any condition which with the passage of time or the giving of notice would
 cause such a violation of or default under) any AH Agreement to which AH or
 any of its Subsidiaries is a party or by which AH or any of its
 Subsidiaries or any of their respective properties or assets is or may be
 bound or affected, except for violations or defaults that could not
 reasonably be expected, individually or in the aggregate, to have a
 Material Adverse Effect on AH.

           Section 3.14  Litigation.  Except as set forth in Section 3.14 of
 the AH Disclosure Schedule, there is no suit, claim, action, or proceeding
 (collectively, the "Claims") pending or, to the knowledge of AH, threatened
 against AH or any of its Subsidiaries before any Governmental Entity nor to
 the knowledge of AH are there any investigations or reviews by any
 Governmental Entity pending or threatened against, relating to or affecting
 AH or any of its Subsidiaries, in each case, that, if adversely determined
 could reasonably be expected, individually or in the aggregate, to have a
 Material Adverse Effect on AH.  Neither AH nor any of its Subsidiaries is
 subject to any outstanding order, writ, injunction or decree of any court
 or Governmental Entity which could reasonably be expected, individually or
 in the aggregate, to have a Material Adverse Effect on AH.

           Section 3.15  Intellectual Property.

           (a)  (i)     Section 3.15(a)(i) of the AH Disclosure Schedule
      sets forth all material United States and foreign patents and patent
      applications, trademark and service mark registrations and
      applications, Internet domain names, and copyright registrations and
      applications owned by AH and its Subsidiaries, specifying as to each
      item, as applicable: (A) the jurisdictions in which the item is issued
      or registered or in which an application for issuance or registration
      has been filed; and (B) the issuance, registration and application
      numbers, and dates thereof.

                (ii) Section 3.15(a)(ii) of the AH Disclosure Schedule sets
      forth all material licenses, material sublicenses, and other material
      agreements or permissions ("IP Licenses") pursuant to which AH or any
      of its Subsidiaries is a licensor or licensee of or otherwise is
      authorized to use or practice under any third party rights in any
      Intellectual Property (as defined below) on an exclusive basis and any
      non-exclusive IP License that, to the knowledge of AH, is not
      available to parties other than AH or any of its Subsidiaries on
      comparable commercial terms to which it is licensed to AH or such
      Subsidiary.  To the knowledge of AH, all such IP Licenses are valid,
      enforceable and in full force and effect in accordance with their
      respective terms, and, to the knowledge of AH, there exists no event
      or condition which will result in a violation or breach of, or
      constitute (with or without due notice or lapse of time or both) a
      default by AH or any of its Subsidiaries (or, to the knowledge of AH,
      any other party thereto) under any IP License.  For purposes of this
      Agreement, "Intellectual Property" means all of the following as they
      exist in all jurisdictions throughout the world, in each case, to the
      extent owned by, licensed to, or otherwise used by AH or any of its
      Subsidiaries:  (A) patents, patent applications, invention
      disclosures, and other patent rights (including any divisions,
      continuations, continuations-in-part, substitutions, or reissues
      thereof, whether or not patents are issued on any such applications
      and whether or not any such applications are modified, withdrawn, or
      resubmitted); (B) registered and unregistered trademarks, service
      marks, slogans, trade dress, trade names, brand names, Internet domain
      names, designs, logos, or corporate names; (C) registered or
      unregistered copyrights, including all renewals and extensions
      thereof; (D) trade secrets, concepts, ideas, designs, research,
      processes, procedures, techniques, methods, know-how, data, mask
      works, discoveries, inventions, modifications, extensions,
      improvements, and other proprietary rights (whether or not patentable
      or subject to copyright, mask work, or trade secret protection), and
      technical manuals and documentation with respect to any of the
      foregoing (collectively, the "Technology"); and (E) computer software
      programs and databases, including all source code, object code, and
      documentation related thereto (the "Software").  References in this
      Agreement to "Owned Intellectual Property," "Owned Software" and
      "Owned Technology" shall refer to Intellectual Property, Software or
      Technology, as applicable, owned by, or exclusively licensed to, AH or
      any of its Subsidiaries.  References to "Leased Intellectual Property"
      shall refer to Intellectual Property non-exclusively licensed to, or
      otherwise used by, AH or any of its Subsidiaries.

           (b)  AH and its Subsidiaries own or license, free and clear of
 all Encumbrances, all Owned Intellectual Property and, to the knowledge of
 AH,  have valid rights to use all Licensed Intellectual Property used in or
 necessary for the conduct of their respective businesses and operations as
 currently conducted and as presently proposed to be conducted.

           (c)  All of the registrations and applications set forth in
 Section 3.15(a)(i) of the AH Disclosure Schedule are, to the knowledge of
 AH, in good standing and are valid and enforceable.  No such registrations
 or applications are subject to any pending or, to the knowledge of AH,
 threatened opposition, cancellation, interference or similar adversarial
 proceedings before any registration authority, and either AH or one of its
 Subsidiaries is the record owner of each such registration and application.

           (d)  None of AH or any of its Subsidiaries has been, during the
 three years preceding the date of this Agreement, a party to any Claim,
 nor, to the knowledge of AH, is any Claim threatened against AH or any of
 its Subsidiaries, that challenges the validity, enforceability, ownership,
 or right to use, sell, or license any Intellectual Property, which Claims,
 if adversely determined, could reasonably be expected, individually or in
 the aggregate, to have a Material Adverse Effect on AH.  To the knowledge
 of AH, no third party is infringing upon or diluting any Owned Intellectual
 Property material to AH and its Subsidiaries' respective businesses and
 operations.

           (e)  There are no settlement agreements to which AH or any of its
 Subsidiaries is a party, consents to which AH or any of its Subsidiaries
 are subject, judgments against AH or any of its Subsidiaries, orders to
 which AH or any of its Subsidiaries are subject, forebearances to sue or
 similar obligations with respect to AH or any of its Subsidiaries, in each
 case, which restrict in any material respect AH's and its Subsidiaries'
 rights to (i) use, sell or license any Owned Intellectual Property or (ii)
 conduct its business in order to accommodate a third party's Intellectual
 Property rights.

           (f)  AH has taken commercially reasonable actions (which the
 parties expressly agree may include treating such Owned Intellectual
 Property as trade secrets, without seeking any trademark or copyright
 registrations or applications or patent protection) to maintain and protect
 each item of Owned Intellectual Property that is material to AH's or any of
 its Subsidiaries' businesses and operations and, except as set forth in
 Section 3.15(f) of the AH Disclosure Schedule, has obtained customary
 confidentiality agreements in respect of such Owned Intellectual Property
 from each employee or consultant of AH or any of its Subsidiaries.

           (g)  AH has taken commercially reasonable precautions (which the
 parties expressly agree may include treating such Owned Technology as trade
 secrets, without seeking any trademark or copyright registrations or
 applications or patent protection) to protect the secrecy, confidentiality,
 and value of its and its Subsidiaries' trade secrets and the proprietary
 nature and value of the Owned Technology material to its or any of its
 Subsidiaries' respective businesses and operations.

           (h)  Except as set forth in Section 3.15(h) of the AH Disclosure
 Schedule, to the knowledge of AH, all Owned Software that is currently used
 by AH and its Subsidiaries that is material to AH or any of its
 Subsidiaries' businesses and operations performs or is reasonably expected
 to perform in all material respects the functions for which such Owned
 Software is used by AH or such Subsidiary.

           (i)  To the knowledge of AH, none of the Software, hardware
 (whether general or special purpose), embedded control systems and other
 similar or related items of automated, computerized, and/or software
 system(s) that are used or relied on by AH and its Subsidiaries in the
 conduct of their businesses (collectively, the "Systems") will malfunction,
 will cease to function, will generate incorrect data, and will provide
 incorrect results when processing, calculating, comparing, sequencing,
 displaying, storing, providing, and/or receiving (i) date-related data into
 and between the twentieth and twenty-first centuries, and (ii) date-related
 data in connection with any valid date in the twentieth and twenty-first
 centuries, except as could not reasonably be expected, individually or in
 the aggregate, to have a Material Adverse Effect on AH.

           (j)  None of AH or any of its Subsidiaries is, nor, as a result
 of the execution and delivery of this Agreement or the performance of its
 obligations under this Agreement, will be, in material violation of any
 agreement relating to any Owned Intellectual Property or, to the knowledge
 of AH, any Licensed Intellectual Property, in each case, material to their
 respective business and operations.  After the completion of the
 transactions contemplated by this Agreement, AH and its Subsidiaries will
 continue to own all right, title, and interest in and to or have a license
 to use all Owned Intellectual Property (including all Owned Software) and,
 to the knowledge of AH, all Licensed Intellectual Property, in each case,
 material to their respective businesses and operations on terms and
 conditions identical in all material respects to those enjoyed by them
 immediately prior to such transactions.

           Section 3.16  Non-Competition Agreements.  Except as set forth in
 Section 3.16 of the AH Disclosure Schedule, neither AH nor any of its
 Subsidiaries is a party to any agreement which purports to restrict or
 prohibit in any material respect AH and its Subsidiaries collectively from,
 directly or indirectly, engaging in any business.  None of the officers,
 members or key employees of AH or any of its Subsidiaries is a party to any
 agreement which, by virtue of such person's relationship with AH or any of
 its Subsidiaries, restricts in any material respect AH or any of its
 Subsidiaries or any affiliate of any of them from, directly or indirectly,
 engaging in any business.

           Section 3.17  Certain Agreements.  Except as set forth in
 Section 3.17 of the AH Disclosure Schedule, neither AH nor any of its
 Subsidiaries is a party to any oral or written (i) agreement with any
 executive officer or other key employee of AH or its Subsidiaries the
 benefits of which are contingent, or the terms of which are materially
 altered, upon the occurrence of a transaction involving AH of the nature
 contemplated by this Agreement, or (ii) plan, including any option plan or
 other benefits plan, any of the benefits of which will be increased, or the
 vesting of the benefits of which will be accelerated, by the occurrence of
 any of the transactions contemplated by this Agreement or the value of any
 of the benefits of which will be calculated on the basis of any of the
 transactions contemplated by this Agreement.

           Section 3.18  Real Property.  Neither AH nor any of its
 Subsidiaries owns any fee interest in real estate.  Except as set forth in
 Section 3.18 of the AH Disclosure Schedule, none of AH or any of its
 Subsidiaries is a party to any material leases, subleases and other
 agreement (the "AH Real Property Leases") under which AH or any of it
 Subsidiaries uses or occupies or has the right to use or occupy, now or in
 the future, any real property.  AH has heretofore made available to KT
 true, correct and complete copies of all written, and true, complete and
 correct written summaries of all oral, AH Real Property Leases (and all
 modifications, amendments and supplements thereto and all side letters to
 which AH or any of its Subsidiaries is a party affecting the obligations of
 any party thereunder).  Assuming the due authorization, execution and
 delivery by the other parties thereto, each AH Real Property Lease
 constitutes the valid and legally binding obligation of AH or the relevant
 Subsidiary, enforceable in accordance with its terms, subject to
 bankruptcy, insolvency, reorganization, moratorium or other laws now or
 hereafter in effect relating to creditors' rights generally or to general
 principles of equity, and is in full force and effect.  All material
 amounts payable by AH and its Subsidiaries as tenants under each AH Real
 Property Lease are current, and no termination event or condition or
 uncured default of a material nature on the part of AH or any of its
 Subsidiaries exists under any AH Real Property Lease.  To the knowledge of
 AH, the leasehold interests of AH and its Subsidiaries in each parcel of
 real property leased by them are held free and clear of all Encumbrances,
 except (i) Taxes and general and special assessments not in default and
 payable without penalty and interest, (ii) Encumbrances under applicable
 Law and (iii) other Encumbrances which do not materially interfere with
 AH's or any of its Subsidiaries' use and enjoyment of such real property or
 materially detract from or diminish the value thereof.

           Section 3.19  Investment Company Act.  Each of AH and its
 Subsidiaries either (i) is not an "investment company," or a company
 "controlled" by, or an "affiliated company" with respect to, an "investment
 company," each within the meaning of the Investment Company Act (as
 hereinafter defined) or (ii) satisfies all conditions for an exemption from
 the Investment Company Act, and, accordingly, neither AH nor any of its
 Subsidiaries is required to be registered under the Investment Company Act.

           Section 3.20  Brokers.  Except as set forth in Section 3.20 of
 the AH Disclosure Schedule, no broker, finder or investment banker is
 entitled to any brokerage, finder's or other fee or commission in
 connection with the Mergers or the other transactions contemplated by this
 Agreement based upon arrangements made by or on behalf of AH or any of the
 Members.  Prior to the date of this Agreement, AH has made available to KT
 a complete and correct copy of all agreements between AH or any of the
 Members and any advisor under which such advisor would be entitled to any
 payment relating to the Mergers or any other transactions hereunder.

           Section 3.21  Certain Representations and Warranties as to
 Private Funds.

           (a)  True, correct and complete copies of all of the current
 investment advisory agreements and distribution or underwriting contracts,
 administrative services and other services agreements, if any, and
 organizational and offering documents, pertaining to each of the Private
 Funds (i) have been made available to KT and (ii) are in full force and
 effect.  Such offering materials did not, at the respective dates thereof,
 or at any time at which such materials were distributed or made available
 to investors or prospective investors, contain any untrue statement of a
 material fact or omit to state a material fact required to be stated
 therein or necessary to make the statements therein, in light of the
 circumstances under which they were made, not misleading.  Except for the
 Private Funds, neither AH nor any of its Subsidiaries is affiliated with,
 or otherwise provides investment advisory or other Investment Management
 Services to, any person.

           (b)  Each of the Private Funds is duly organized, validly
 existing and in good standing in the jurisdiction in which it is organized
 and has all requisite power and authority to conduct its business in the
 manner and in the places where such business is currently conducted.  Each
 Private Fund is and, since its inception, has been engaged solely in the
 business of investing and reinvesting in securities and, in the case of the
 Investment Funds, in the manner described in its offering documents.  Each
 Private Fund is and, since its inception, has been in compliance in all
 material respects with all Investment Laws and Regulations (as defined
 below)  to the extent such laws and regulations are applicable to such
 Private Fund.

           (c)  Each of the Private Funds has timely filed all Tax Returns
 (the "Private Fund Tax Returns") required to be filed by it and all such
 Private Fund Tax Returns are true, complete and correct.  All Taxes owed by
 the Private Funds or claimed to be owed by the Private Funds by any
 Governmental Entity for any taxable period (whether or not shown on any
 Private Fund Tax Return) have been timely paid in full or are being
 contested in good faith by appropriate proceedings.  With respect to each
 Private Fund, there are no liabilities for Taxes which have not been paid
 in prior periods or for which an adequate reserve for such liability does
 not exist.  To the knowledge of AH, no deficiencies for any Taxes have been
 threatened, proposed, asserted or assessed against any of the Private Funds
 and no Governmental Entity is conducting or proposing to conduct an audit
 with respect to Taxes of or any Private Fund Tax Return required to be
 filed with respect to any Private Fund.

           (d)  AH has made available to KT true, correct and complete
 copies of the (i) unaudited financial statements of each of the Non-
 Investment Funds (the "Non-Investment Fund Financial Statements") and (ii)
 audited financial statements for each of the Investment Funds (the
 "Investment Fund Financial Statements," and, together with the Non-
 Investment Fund Financial Statements, the "Private Fund Financial
 Statements"), in each case, for the current and the past three fiscal years
 or such shorter period since inception.  Each of the Investment Fund
 Financial Statements (including all notes and schedules contained therein
 or annexed thereto) has been prepared in accordance with GAAP consistently
 applied with past practices, and each of the Non-Investment Fund Financial
 Statements (including all notes and schedules contained therein or annexed
 thereto) has been prepared on a basis consistent with the accounting
 principles used in the preparation of the Investment Fund Financial
 Statements.  Each of the Private Fund Financial Statements (including all
 notes and schedules contained therein or annexed thereto) is consistent
 with the books and records of the applicable Private Fund, and fairly
 presents the assets, liabilities and financial condition, the results of
 operations and cash flows of the applicable Private Fund as of the dates
 and for the years and periods indicated.  The Private Fund Financial
 Statements reflect and disclose all material changes in accounting
 principles and practices adopted by the applicable Private Fund during the
 periods covered by each Private Fund Financial Statement.  The books of
 account of each of the Private Funds fairly reflect their respective
 transactions.

           (e)  There are no consent judgments or regulatory orders on, or
 with regard to, any of the Private Funds.  Since inception, each of the
 Private Funds has been excluded from the definition of an investment
 company under the Investment Company Act by virtue of the respective
 exemptions thereto set forth in Section 3.21(e) of the AH Disclosure
 Schedule and, except as could not reasonably be expected, individually or
 in the aggregate, to have a Material Adverse Effect on AH,  has been duly
 registered and in good standing under the Laws of each jurisdiction in
 which such qualification is necessary.

           (f)  All interests of each of the Private Funds were sold
 pursuant to a valid and effective exemption from registration under
 applicable Investment Laws and Regulations, including, without limitation,
 the Securities Act of 1933, as amended (the "Securities Act") and the
 Securities Exchange Act of 1934, as amended (the "Exchange Act") and have
 been duly authorized and are validly issued.  Each of the Private Funds'
 investments have been made in accordance with its respective investment
 policies and restrictions in effect at the time the investments were made
 and have been held in accordance with its respective investment policies
 and restrictions, to the extent applicable and in effect at the time such
 investments were held.

           (g)  There is no litigation or legal action, suit, proceeding or
 investigation at law or in equity pending or, to the knowledge of AH,
 threatened in any court or before or by any Governmental Entity by or
 against any arbitrator, by or against any of the Private Funds.  There are
 no judgments, injunctions, orders or other judicial or administrative
 mandates outstanding against or affecting any of the Private Funds.

           (h)  For the purposes of this Agreement:

           "Advisers Act" shall mean the Investment Advisers Act of 1940, as
 the same may be amended from time to time, and any successor to such act.

           "Commodity Exchange Act" shall mean the Commodity Exchange Act, 7
 U.S.C. section1 et. seq., as the same may be amended from time to time, and
 any successor to such act.

           "Investment Company Act" shall mean the Investment Company Act of
 1940, as the same may be amended from time to time, and any successor to
 such act.

           "Investment Funds" shall mean Deephaven Market Neutral Fund
 Limited and Deephaven Opportunity Fund Limited, each a British Virgin
 Islands corporation; Deephaven Opportunity Fund LLC and Deephaven Incentive
 Fund LLC, each a Delaware limited liability company; and Deephaven Market
 Neutral Master Fund LP, a British Virgin Island limited partnership.

           "Investment Laws and Regulations" shall mean all Laws, domestic
 or foreign, applicable to the Investment Management Services business
 including, without limitation: (i) the Advisers Act, the Investment Company
 Act, the Exchange Act, ERISA, the Commodity Exchange Act and the Securities
 Act and the regulations promulgated under each of them; (ii) the bylaws,
 rules and regulations of applicable Self-Regulatory Authorities (as
 hereinafter defined in Section 3.23)  and each applicable securities and
 commodities exchange on which AH or any of its affiliates is a member or on
 which any transactions for any account is effected for any of them; and
 (iii) all other foreign, federal or state securities laws and regulations
 applicable to the Investment Management Services business, affairs,
 properties or assets of AH and its Subsidiaries or any of the Private
 Funds.

           "Investment Management Services" shall mean any services which
 involve (a) the management of an investment account or fund (or portions
 thereof or a group of investment accounts or funds), or (b) the giving of
 advice for compensation with respect to the investment and/or reinvestment
 of assets or funds (or any group of assets or funds).

           "Non-Investment Funds" means Private Funds which are not
 Investment Funds.

           "Private Funds" means Deephaven Market Neutral Fund Limited,
 Deephaven Opportunity Fund Limited, Deephaven Market Neutral Trading
 Limited, Deephaven Domestic Convertible Trading Ltd., Deephaven
 International Convertible Trading Ltd., Deephaven Fixed Income Trading
 Ltd., Deephaven Private Placement Trading Ltd., Deephaven Statistical Arb
 Trading Ltd., and Deephaven Risk Arb Trading Ltd., each a British Virgin
 Islands corporation; Deephaven Opportunity Fund LLC and Deephaven Incentive
 Fund LLC, each a Delaware limited liability company; Deephaven Market
 Neutral Master Fund LP and Deephaven Opportunity Trading Fund LP, each a
 British Virgin Island limited partnership; KA Investments LDC, a Cayman
 Islands limited duration corporation; and Deephaven Market Neutral Trading
 LP, an Illinois limited partnership.

           Section 3.22  Compliance with Law.

           (a)  AH and all of its Subsidiaries and the Private Funds have
 complied with all Laws, and are not in default with respect to any order,
 writ, judgment, award, injunction or decree of any Governmental Entity,
 applicable to them or to their respective businesses or any of their
 respective assets, properties or operations, except such failures to comply
 or defaults as could not reasonably be expected, individually or in the
 aggregate, to have a Material Adverse Effect on AH.

           (b)  Neither AH nor any of its Subsidiaries acts as investment
 advisor for any registered investment company.

           (c)  Each of AH and its Subsidiaries and the Private Funds, if so
 required by the nature of its business or assets, is duly registered with
 the SEC and any  applicable Governmental Entities and Self Regulatory
 Authorities as a broker-dealer and/or an exchange member.  Each of AH and
 its Subsidiaries and the Private Funds have made available to KT true,
 complete and correct copies of their respective Form BD and such other
 regulatory filings as may be required by any Governmental Entity (the
 "Regulatory Filings").  As of its respective filing date, each Regulatory
 Filing complied as to form and substance in all material respects with the
 applicable Law requiring such Regulatory Filing to be filed and each
 Regulatory Filing complied in all material respects with applicable
 regulatory requirements and accounting principles applicable to such
 Regulatory Filing.  Each such Regulatory Filing contained all material
 information required to be included therein and did not omit any material
 information so required in order that such Regulatory Filing be true,
 complete and correct in all material respects.

           (d)  AH has made available to KT (i) copies of all Regulatory
 Filings made since January 1, 1997, (ii) copies of all inspection reports
 provided to AH or any of its Subsidiaries or any Private Fund by the SEC or
 any state securities regulatory authority or any self regulatory
 organization and all written responses thereto since January 1, 1997, (iii)
 all correspondence, memoranda or other documentation received by AH or any
 of its Subsidiaries or any Private Fund from the SEC or any state
 securities regulatory authority or any self regulatory organization since
 January 1, 1997, and (iv) copies of all correspondence relating to any
 inquiry or investigation by any foreign Governmental Entity or self
 regulatory authority or to any customer complaint provided to AH or any of
 its Subsidiaries or any Private Fund since January 1, 1997.

           (e)  Except as set forth in Section 3.22(e) of the AH Disclosure
 Schedule, neither AH nor any of its Subsidiaries or any Private Fund is
 required by the nature of its business or assets to register (i) with the
 Commodity Futures Trading Commission and the various states as required as
 a commodities trading advisor or commodity pool operator or futures
 commission merchant or (ii) with the SEC or any applicable Governmental
 Entities or Self Regulatory Authorities as an investment advisor.

           Section 3.23  Agreements with Regulatory Agencies.  Neither AH
 nor any of its Subsidiaries or any Private Fund is subject to any cease-
 and-desist or other order issued by, or is a party to any written
 agreement, consent agreement or memorandum of understanding with, or is a
 party to any commitment letter or similar undertaking to, or is subject to
 any order or directive by, or is a recipient of any supervisory letter from
 or has adopted any resolutions at the request of any Self Regulatory
 Authority (as defined below) or Governmental Entity that restricts the
 conduct of its business or that in any manner relates to its capital
 adequacy, its credit policies, its management or its business (each, a
 "Regulatory Agreement"), nor has AH or any of its Subsidiaries or any
 Private Fund:  (i) been advised by any Self Regulatory Authority or
 Governmental Entity that it is considering issuing or requesting any such
 Regulatory Agreement, or (ii) to the knowledge of AH, received knowledge or
 notice of any pending or threatened regulatory investigation, except any
 such cease-and-desist or other orders, restrictions, Regulatory Agreements
 or regulatory investigations as could not reasonably be expected,
 individually or in the aggregate, to have a Material Adverse Effect on AH.
 "Self Regulatory Authority" shall mean any securities exchange or other
 self regulatory organization in the securities, investment and commodities
 fields.

           Section 3.24  Investment Securities.  Except as set forth in
 Section 3.24 of the AH Disclosure Schedule, each of AH and its Subsidiaries
 and the Private Funds has good and marketable title to all securities held
 by it (except securities sold under repurchase agreements or held in any
 fiduciary or agency capacity), free and clear of any Encumbrance, except to
 the extent such securities are pledged in the ordinary course of business
 consistent with reasonable past business practices to secure obligations of
 AH or its Subsidiaries or the Private Funds.

           Section 3.25  Interest Rate Risk Management Instruments.  All of
 AH's and its Subsidiaries' and the Private Funds' interest rate swaps,
 caps, floors and option agreements and other interest rate risk management
 arrangements (other than bank repurchase agreements with a duration of
 fewer than thirty (30) days), whether entered into for the account of AH or
 any of its Subsidiaries or any of the Private Funds or for the account of a
 customer of any such entity, were entered into in the usual and ordinary
 course of business and in accordance, in all material respects, with
 prudent business practice and applicable rules, regulations and policies of
 any Self Regulatory Authority and, to the knowledge of AH, with
 counterparties believed to be financially responsible at the time.

           Section 3.26  Pooling.

            (a)  AH and the Members intend that the Mergers be accounted for
 under the "pooling-of-interests" method under the requirements of Opinion
 No. 16 (Business Combinations) of the Accounting Principles Board of the
 American Institute of Certified Public Accountants, the Financial
 Accounting Standards Board, and the rules and regulations of the SEC.

           (b)  None of AH, the Members or any of their affiliates has taken
 or failed to take or agreed to take or fail to take any action or is aware
 of any fact or circumstance that would prevent the Mergers from qualifying
 for "pooling-of-interests" accounting treatment as described in Section
 3.26(a) above.


                                 ARTICLE IV
                       REPRESENTATIONS AND WARRANTIES
                                   OF KT

           Except as set forth in the disclosure schedule delivered by KT
 prior to the execution of this Agreement (the "KT Disclosure Schedule")
 making reference to the particular section or subsection of this Agreement
 to which an exception is being taken, KT hereby represents and warrants to
 AH, as of the date hereof and as of the KT Closing Date, as follows:

           Section 4.1  Organization, Qualification, Etc.  Each of KT,
 Parent, SubKT, SubAH and each Significant Subsidiary (as defined below) is
 a corporation or limited liability company duly organized, validly existing
 and in good standing (or other equivalent status) under the laws of the
 jurisdiction of its incorporation or organization and has the corporate or
 limited liability company power and authority to own, operate and lease all
 of its properties and assets and to carry on its business as it is now
 being conducted or presently proposed to be conducted and is duly qualified
 to do business and is in good standing (or other equivalent status) in each
 jurisdiction in which the ownership, operation or leasing of its properties
 or assets or the conduct of its business requires such qualification,
 except for jurisdictions in which the failure to be so qualified or in good
 standing (or other equivalent status) could not reasonably be expected,
 individually or in the aggregate, to have a Material Adverse Effect on KT
 and its Subsidiaries, taken as a whole.  As used in this Agreement, any
 reference to any state of facts, event, change or effect having a "Material
 Adverse Effect" on or with respect to KT, means such state of facts, event,
 change or effect that, individually or in the aggregate, has had or could
 reasonably be expected to have a material adverse effect on the business,
 assets, results of operations or condition (financial or otherwise) of KT
 and its Subsidiaries, taken as a whole (except for any state of facts,
 event, change or effect (i) relating to general economic conditions in the
 geographic areas in which KT and its Subsidiaries operate or invest or
 (ii) similarly affecting other persons in the industries in which KT and
 its Subsidiaries operate), or that could reasonably be expected to
 materially impair the ability of KT to perform its obligations under this
 Agreement or consummate the Mergers or the other transactions contemplated
 hereby.  For purposes of this Agreement, "Significant Subsidiary" shall
 mean any Subsidiary of KT which is a "significant subsidiary" of KT (as
 such term is defined in Rule 1-02 of Regulation S-X under the Securities
 Act).

           Section 4.2  Capital Stock.

           (a)  Section 4.2(a) of the KT Disclosure Schedule sets forth as
 of November 12, 1999:

                (i)  the number of authorized shares of each class or series
      of capital stock of KT;

                (ii) the number of shares of each class or series of capital
      stock of KT which are issued and outstanding;

                (iii)     the number of shares of each class or series of
      capital stock which are held in the treasury of KT;

                (iv) the number of shares of each class or series of capital
      stock of KT which are reserved for issuance, indicating each specific
      reservation; and

                (v)  the number of shares of each class or series of capital
      stock of KT which are subject to employee stock options or other
      rights to purchase or receive capital stock granted under KT's stock

      option or other stock based employee or non-employee director benefit
      plans.

           (b)  All of the issued and outstanding shares of capital stock of
 KT have been validly issued and are fully paid and nonassessable.  Except
 as set forth in Section 4.2(a) of the KT Disclosure Schedule, there are no
 authorized, issued, reserved for issuance or outstanding (i) shares of
 capital stock or voting securities of KT, (ii) securities convertible into
 or exchangeable for shares of capital stock or voting securities of KT,
 (iii) warrants, calls, options or other rights to acquire from KT or any of
 its Subsidiaries, or any obligation of KT or any of its Subsidiaries to
 issue, any shares of capital stock or voting securities or securities
 convertible into or exchangeable or exercisable for capital stock or voting
 securities of KT, and (iv) there are no outstanding obligations of KT to
 repurchase, redeem or otherwise acquire any such securities or to issue,
 deliver or sell, or cause to be issued, delivered or sold, any such
 securities.

           (c)  All of the issued and outstanding shares of capital stock
 of, or other voting securities or ownership interests in, each Significant
 Subsidiary have been validly issued and are fully paid and nonassessable
 and are owned of record and beneficially by KT, directly or indirectly.
 There are no (i) securities of KT or any Significant Subsidiary convertible
 into or exchangeable or exercisable for shares of capital stock or other
 voting securities or ownership interests in any Significant Subsidiary,
 (ii) warrants, calls, options or other rights to acquire from KT or any
 Significant Subsidiary, or any obligations of KT or any of Significant
 Subsidiary to issue, any capital stock, voting securities or other
 ownership interests in, or any securities convertible into or exchangeable
 or exercisable for, any capital stock, voting securities or ownership
 interests in, any Significant Subsidiary, or (iii) obligations of KT or any
 Significant Subsidiary to repurchase, redeem or otherwise acquire any
 outstanding securities of any Significant Subsidiary or to issue, deliver
 or sell, or cause to be issued, delivered or sold, any such securities.

           (d)  All of the issued and outstanding shares of capital stock
 of, or other voting securities or ownership interests in, each of SubKT and
 SubAH have been validly issued and are fully paid and nonassessable and are
 owned of record and beneficially by Parent.  All of the outstanding shares
 of capital stock of Parent have been validly issued and are fully paid and
 nonassessable and are owned of record and beneficially by KT.  All shares
 of Parent Common Stock to be issued as part of the Merger Consideration,
 when issued in accordance with the terms hereof, will be validly issued,
 fully paid and nonassessable.

           Section 4.3  Corporate Authority Relative to this Agreement.
 Each of KT and Parent has the corporate power and authority to enter into
 this Agreement and to carry out its obligations hereunder.  The execution,
 delivery and performance of this Agreement and the consummation of the
 transactions contemplated hereby have been duly and validly authorized by
 the Board of Directors of KT and no other corporate proceedings on the part
 of KT are necessary to authorize this Agreement or the consummation of the
 transactions contemplated hereby.  The execution, delivery and performance
 of this Agreement and the consummation of the transactions contemplated
 hereby have been duly and validly authorized by the Board of Directors and
 the sole stockholder of Parent and no other corporate proceedings on the
 part of Parent are necessary to authorize this Agreement or the
 consummation of the transactions contemplated hereby.  This Agreement has
 been duly and validly executed and delivered by KT and Parent and, assuming
 this Agreement constitutes a valid and binding agreement of the other
 parties hereto, this Agreement constitutes a valid and binding agreement of
 KT and Parent, enforceable against KT and Parent in accordance with its
 terms (except insofar as enforceability may be limited by applicable
 bankruptcy, insolvency, reorganization, moratorium or similar laws
 affecting creditors' rights generally or by principles governing the
 availability of equitable remedies).

           Section 4.4  Non-Contravention; Consents and Approvals.

           (a)  None of the execution, delivery or performance of this
 Agreement by KT or the consummation by KT of the transactions contemplated
 hereby will (i) violate the certificate of incorporation, the bylaws or
 other similar governing documents of KT or any of its Subsidiaries, (ii)
 except for all third party consents and approvals required to be obtained
 under any note, bond, mortgage, deed of trust, security interest,
 indenture, lease, license, contract, agreement, plan or other instrument or
 obligation to which KT or any of its Subsidiaries is a party or by which
 any of them or any of their properties or assets may be bound (the "KT
 Agreements") prior to the consummation of the transactions contemplated by
 this Agreement the failure of which to obtain could reasonably be expected,
 individually or in the aggregate, to have a Material Adverse Effect on KT
 (the "KT Required Third Party Consents"), result in the violation or breach
 of or constitute (with or without due notice or lapse of time or both) a
 default (or give rise to any right of termination, cancellation, vesting,
 payment, exercise, acceleration, suspension or revocation) under any of the
 provisions of any KT Agreement, (iii) except for all notices to, filings
 and registrations with, and permits, authorizations, consents and approvals
 of, Governmental Entities required to be made or obtained from Governmental
 Entities prior to the consummation of the transactions contemplated by this
 Agreement the failure of which to obtain could reasonably be expected,
 individually or in the aggregate, to have a Material Adverse Effect on KT
 (the "KT Required Statutory Approvals"), violate any Law of any
 Governmental Entity applicable to KT or any of its Subsidiaries or any of
 their respective property or assets, or (iv) result in the creation or
 imposition of any Encumbrance on any asset of KT or any of its
 Subsidiaries, except in the case of clauses (ii), (iii) and (iv) for
 violations, breaches, defaults, terminations, cancellations, accelerations
 or creations which could not reasonably be expected, individually or in the
 aggregate, to have a Material Adverse Effect on KT.

           (b)  Section 4.4(b)(i) of the KT Disclosure Schedule sets forth a
 list of all KT Required Third Party Consents.  Section 4.4(b)(ii) of the KT
 Disclosure Schedule sets forth a list of all KT Required Statutory
 Approvals.

           (c)        None of the execution, delivery or performance of this
 Agreement by Parent or the consummation by Parent of the transactions
 contemplated hereby will violate the certificate of incorporation or the
 bylaws of Parent.

           Section 4.5  Reports and Financial Statements.  KT has made
 available to AH complete and correct copies of:

           (a)  KT's Annual Report on Form 10-K filed with the SEC for the
 year ended December 31, 1998;

           (b)  KT's  Quarterly Reports on Form 10-Q filed with the SEC for
 each of the fiscal quarters ended following KT's last fiscal year end;

           (c)  each definitive proxy statement filed by KT with the SEC;
 and

           (d)  all Current Reports on Form 8-K filed by KT with the SEC
 since January 1, 1999.

 As of their respective dates, such reports and proxy statements
 (collectively, with any amendments, supplements and schedules thereto, the
 "SEC Reports") (i) complied as to form in all material respects with the
 applicable requirements of the Securities Act, the Exchange Act, and the
 rules and regulations promulgated thereunder, and (ii) did not contain any
 untrue statement of a material fact or omit to state a material fact
 required to be stated therein or necessary to make the statements therein,
 in light of the circumstances under which they were made, not misleading.
 Except to the extent that information contained in any SEC Report of KT has
 been revised or superseded by an SEC Report subsequently filed by KT, none
 of the SEC Reports contains any untrue statement of a material fact or
 omits to state any material fact required to be stated therein or necessary
 in order to make the statements therein, in light of the circumstances
 under which they were made, not misleading.  The audited consolidated
 financial statements and unaudited consolidated interim financial
 statements included in the SEC Reports (including all notes and schedules
 contained therein or annexed thereto) have been prepared in accordance with
 GAAP consistently applied with past practices, are consistent with the
 books and records of KT and its Subsidiaries, and fairly present in all
 material respects the assets, liabilities and financial condition, the
 results of operations and cash flows of KT as of the dates and for the
 years and periods indicated.  KT has timely filed all reports, registration
 statements and other filings required to be filed by it with the SEC under
 the rules and regulations of the SEC.

           Section 4.6  No Prior Activities.  Parent, SubKT and SubAH were
 each formed for the purpose of engaging in the transactions contemplated by
 this Agreement, and, to the knowledge of KT, none of them has any
 Subsidiaries or has undertaken any business or other activities other than
 in connection with entering into this Agreement and engaging in the
 transactions contemplated hereby.

           Section 4.7  Brokers.  Except as set forth in Section 4.7 of the
 KT Disclosure Schedule, no broker, finder or investment banker is entitled
 to any brokerage, finder's or other fee or commission in connection with
 the Mergers or the other transactions contemplated by this Agreement based
 upon arrangements made by or on behalf of KT.

           Section 4.8  Absence of Certain Changes or Events.  Since
 September 30, 1999 and through the date hereof, there has not occurred any
 event, development or change which could reasonably be expected,
 individually or in the aggregate, to have a Material Adverse Effect on KT.

           Section 4.9  Pooling.

           (a)  KT intends that the Mergers be accounted for as a "pooling-
 of-interests" as described in Section 3.26(a).

           (b)  Neither KT nor any of its affiliates has taken or failed to
 take or agreed to take or fail to take any action or is aware of any fact
 or circumstance that would prevent the Mergers from qualifying for
 "pooling-of-interests" accounting treatment as described in Section
 3.26(a).


                                  ARTICLE V
                          COVENANTS AND AGREEMENTS

           Section 5.1  Conduct of Business Pending the Effective Time.

           (A)  Except as set forth in Section 5.1(A) of the AH Disclosure
 Schedule, from and after the date hereof and prior to the Effective Time or
 the date, if any, on which this Agreement is earlier terminated pursuant to
 Section 7.1 (the "Termination Date"), and except as may be agreed in
 writing by KT or as may be expressly provided for or permitted pursuant to
 this Agreement:

           (a)  AH shall, and shall cause each of its Subsidiaries and each
 of the Private Funds to, conduct its business in the ordinary course of
 business consistent with past practice;

           (b)  AH shall use its reasonable best efforts, and shall cause
 each of its Subsidiaries to use its reasonable best efforts, to preserve
 intact its business organizations and goodwill, keep available the services
 of its current officers and other key employees and preserve its
 relationships with those persons having business dealings with it
 (including its relationships with customers, suppliers, employees and
 business partners);

           (c)  AH shall confer at such times as KT may reasonably request
 with one or more representatives of KT to report material operational
 matters and the general status of ongoing operations (to the extent KT
 reasonably requires such information);

           (d)  AH shall notify KT of any emergency or other change in the
 normal course of its, its Subsidiaries' or any of the Private Funds'
 respective businesses or in the operation of its, its Subsidiaries, or any
 of the Private Funds' respective properties and of any complaints or
 hearings (or communications indicating that the same may be contemplated)
 of any Governmental Entity;

           (e)  AH shall not, and shall not permit any of its Subsidiaries
 to, split, combine or reclassify any of its shares of capital stock or
 other equity securities or interests;

           (f)  AH shall not, and shall not permit any of its Subsidiaries
 to, except (i) in the ordinary course of business consistent with past
 practice, (ii) as otherwise provided in this Agreement, or (iii) as
 required by applicable Law, adopt or amend any Employee Benefit Plan;

           (g)  AH shall not, and shall not permit any of its Subsidiaries
 or any of the Private Funds to, authorize, propose or announce an intention
 to authorize or propose, or enter into an agreement with respect to, any
 acquisition of a material amount of assets or securities, any disposition
 of a material amount of assets or securities or any release or
 relinquishment of any material contract rights, other than securities
 acquired or disposed of in connection with trading activities or
 investments in capital market securities, in each case, in the ordinary
 course of business consistent with past practice;

           (h)  AH shall not, and shall not permit its Subsidiaries or any
 of the Private Funds to, propose or adopt any amendments to their
 respective certificates of incorporation, bylaws or other similar governing
 documents;

           (i)  AH shall not, and shall not permit any of its Subsidiaries
 to, issue or authorize the issuance of, or agree to issue or sell any
 shares of their capital stock of any class or other equity securities or
 interests (whether through the issuance or granting of options, warrants,
 commitments, subscriptions, rights to purchase, or otherwise);

           (j)  AH shall not, and shall not permit any of its Subsidiaries
 or any of the Private Funds to, purchase, or redeem any shares of its stock
 or other equity securities or interests or any rights, warrants or options
 to acquire any such shares, securities or interests, except for redemptions
 of interests in any of the Private Funds in the ordinary course of business
 and in accordance with the terms of their respective governing instruments
 as in effect on the date hereof;

           (k)  AH shall not, and shall not permit any of its Subsidiaries
 or any of the Private Funds to, incur, assume or prepay any indebtedness or
 any other material liabilities;

           (l)  AH shall not, and shall not permit any of its Subsidiaries
 or any of the Private Funds to, sell, lease, license, mortgage or otherwise
 encumber or subject to any Encumbrance or otherwise dispose of any of its
 properties or assets (including securitization), other than in the ordinary
 course of business consistent with past practice;

           (m)  AH shall not, and shall not permit any of its Subsidiaries
 or any of the Private Funds to, take any action or fail to take any action,
 which action or failure could reasonably be expected to cause the Mergers
 not to constitute transactions described in Section 351 or, in the case of
 the KT Merger, Section 368(a) of the Code;

           (n)  AH shall not, and shall not permit any of its Subsidiaries
 or any of the Private Funds to, make any material Tax election, file any
 amended Tax Return or settle or compromise any material Tax liability;

           (o)  AH shall not, and shall not permit any of it Subsidiaries or
 any of the Private Funds to, waive, release, assign, settle or compromise
 any material claims or litigation;

           (p)  AH shall not, and shall not permit any of its Subsidiaries
 or any of the Private Funds to, take any action or fail to take any action,
 which action or failure could reasonably be expected to prevent accounting
 for the Mergers in accordance with the "pooling-of-interests" method of
 accounting as described in Section 3.26(a); and

           (q)  AH shall not, and shall not permit any of its Subsidiaries
 or any of the Private Funds to, and the Members shall not, agree, in
 writing or otherwise, to take any of the foregoing actions or take any
 action which would (i) make any representation or warranty made by AH or
 any of the Members in Article III hereof untrue or incorrect or (ii) result
 in any of the conditions to the Mergers set forth in Article VI not being
 satisfied.

           (B)  Except as set forth in Section 5.1(B) of the KT Disclosure
 Schedule, from and after the date hereof and prior to the Effective Time or
 the Termination Date, and except as may be agreed in writing by AH or as
 may be expressly provided for or permitted pursuant to this Agreement:

           (a)  KT shall not, and shall not permit any of its Subsidiaries
 to, take any action or fail to take any action, which action or failure
 could reasonably be expected to cause the Mergers not to constitute
 transactions described in Section 351 or, in the case of the KT Merger,
 Section 368(a) of the Code;

           (b)  KT shall not, and shall not permit any of its Subsidiaries
 to, take any action or fail to take any action, which action or failure
 could reasonably be expected to prevent accounting for the Mergers in
 accordance with the "pooling-of-interests" method of accounting as
 described in Section 3.26(a);

           (c)  KT shall not, and shall not permit any of its Subsidiaries
 to, make any sale, transfer or disposition of material assets, securities
 or businesses (whether by merger, consolidation or otherwise) or enter into
 an agreement to acquire material assets of, or enter into a material joint
 venture with, another person, in each case, that would cause a material
 delay in the completion of the transactions contemplated by this Agreement;
 and

           (d)  KT shall not, and shall not permit any of its Subsidiaries
 to, agree, in writing or otherwise, to take any of the foregoing actions or
 take any action which would (i) make any representation or warranty made by
 KT in Article IV hereof untrue or incorrect or (ii) result in any of the
 conditions to the Mergers set forth in Article VI not being satisfied.

           Section 5.2  Investigation.  Each of AH and KT shall (and shall
 cause its respective Subsidiaries to) afford to one another and to one
 another's officers, employees, accountants, counsel and other authorized
 representatives full and complete access on reasonable prior notice during
 normal business hours, throughout the period prior to the earlier of the
 Effective Time or the Termination Date, to its and its Subsidiaries'
 properties, contracts, commitments, books, and records (including but not
 limited to Tax Returns) and any report, schedule or other document filed or
 received by it or any of its Subsidiaries pursuant to the requirements of
 federal or state securities laws or filed with or sent to the SEC, the
 Department of Justice, the Federal Trade Commission or any other
 Governmental Entity and shall use their reasonable best efforts to cause
 their respective representatives and Subsidiaries to furnish promptly to
 one another such additional financial and operating data and other
 information as to its and its Subsidiaries' respective businesses and
 properties as the other or its duly authorized representatives may from
 time to time reasonably request; provided, that nothing herein shall
 require either AH or KT or any of their respective Subsidiaries to disclose
 any information to the other that would cause significant competitive harm
 to such disclosing party or its affiliates if the transactions contemplated
 by this Agreement are not consummated.  The parties hereby agree that each
 of them will treat any such information in accordance with the
 Confidentiality Agreement, dated as of September 14, 1999, between AH and
 KT (the "Confidentiality Agreement").   Notwithstanding any provision of
 this Agreement to the contrary, no party shall be obligated to make any
 disclosure in violation of applicable Laws.

           Section 5.3  NASDAQ Filings and Other Cooperation.

           (a)  As promptly as reasonably practicable following the date of
 this Agreement, KT shall prepare and file with the NMS application for
 approval for quotation on the NMS of the shares of Parent Common Stock
 issuable in the Mergers or upon exercise of KT stock options, warrants,
 conversion rights or other rights or vesting or payment of other KT equity-
 based awards, and use its reasonable best efforts to obtain, prior to the
 KT Effective Time, approval for such quotation of such Parent Common Stock,
 subject only to official notice of issuance.

           (b)  AH and its Subsidiaries shall promptly provide to KT and
 Parent any information and materials (including audited and unaudited
 financial statements) reasonably requested by KT or Parent.

           (c)  KT and AH shall cooperate with one another in order to lift
 any injunctions or remove any other impediment to the consummation of the
 transactions contemplated herein.

           (d)  Subject to the limitations contained in Section 5.2, AH and
 KT shall each furnish to one another and to one another's counsel all such
 information as may be required in order to effect the foregoing actions and
 each represents and warrants to the other that no information furnished by
 it in connection with such actions or otherwise in connection with the
 consummation of the transactions contemplated by this Agreement will
 contain any untrue statement of a material fact or omit to state a material
 fact required to be stated in order to make any information so furnished,
 in light of the circumstances under which it is so furnished, not
 misleading.

           (e)  KT shall cause Parent, SubKT and SubAH to adopt this
 Agreement and take all additional actions as may be necessary to cause
 Parent, SubKT and SubAH  to effect the transactions contemplated hereby.

           Section 5.4  Affiliate Agreements.  AH shall, as soon as
 reasonably practicable, deliver to KT a list (reasonably satisfactory to
 counsel for KT), setting forth the names and addresses of all persons who
 as of the date hereof, to the knowledge of AH, may be deemed "affiliates"
 (as hereinafter defined) of AH for purposes of Rule 145 under the
 Securities Act or under applicable SEC accounting releases with respect to
 pooling-of-interests accounting treatment.  AH shall furnish such
 information and documents as KT may reasonably request for the purpose of
 reviewing such list.  AH and the Members shall deliver to Parent a written
 agreement on or prior to the twentieth day after the date of this
 Agreement, in substantially the form of Exhibit D hereto (the "Affiliate
 Letters"), executed by each person who is identified as an "affiliate" (as
 hereinafter defined) in the list furnished pursuant to this Section 5.4 (an
 "AH Affiliate").

           Section 5.5  AH Employee Benefit Plans.

           (a)  Parent and its Subsidiaries and affiliates agree to honor in
 accordance with their terms the Employee Benefit Plans or to provide
 substantially similar rights and benefits under comparable plans of Parent
 or any of its Subsidiaries.

           (b)  Parent shall take, and shall cause the Surviving LLC and its
 Subsidiaries and all other affiliates of Parent to use their reasonable
 best efforts to take, the following actions:  (i) waive any limitations
 regarding pre-existing conditions and eligibility waiting periods under any
 welfare or other employee benefit plan maintained by any of them for the
 benefit of employees of AH or any of its Subsidiaries immediately prior to
 the Effective Time (the "AH Employees") or in which AH Employees
 participate after the Effective Time except to the extent any such
 limitations or waiting periods in effect under comparable Employee Benefit
 Plans have not been satisfied as of the Effective Time, (ii) provide each
 AH Employee with credit for any co-payments and deductibles paid prior to
 the Effective Time for the calendar year in which the Effective Time
 occurs, in satisfying any applicable deductible or out-of-pocket
 requirements under any welfare plans that such employees are eligible to
 participate in after the Effective Time, and (iii) for all purposes (other
 than for purposes of benefit accruals under any defined benefit pension
 plan) under all compensation and benefit plans and policies applicable to
 AH Employees, treat all service by AH Employees with AH or any of its
 Subsidiaries or affiliates before the Effective Time as service with Parent
 and its Subsidiaries and affiliates.

           (c)  From and after the Effective Time, Parent agrees that the AH
 Employees will be eligible to participate in employee incentive or benefit
 plans, programs or arrangements of Parent, including stock option plans, on
 the same terms as other employees of Parent and its Subsidiaries.

           Section 5.6  KT Employee Stock Options, Incentive and Benefit
 Plans.

           (a)  Simultaneously with the KT Merger, (i) each outstanding
 option ("KT Stock Options") to purchase or acquire a share of KT Class A
 Common Stock under employee incentive or benefit plans, programs or
 arrangements and non-employee director plans presently maintained by KT
 ("KT Option Plans") shall be converted into an option to purchase the
 number of shares of Parent Common Stock equal to the number of shares of KT
 Class A Common Stock which could have been obtained prior to the KT
 Effective Time upon the exercise of each such option, at an exercise price
 per share equal to the exercise price for each such share of KT Class A
 Common Stock subject to an option under the KT Option Plans, and all
 references in each such option to KT shall be deemed to refer to Parent,
 where appropriate, and (ii) Parent shall assume the obligations of KT under
 the KT Option Plans.  The other terms of each such KT Stock Option, and the
 plans under which they were issued, shall continue to apply in accordance
 with their terms, including any provisions providing for acceleration of
 vesting or payment.

           (b)  Simultaneously with the KT Merger, each outstanding award
 including restricted stock and phantom stock or common stock equivalents
 ("KT Award") under any employee incentive or benefit plans, programs or
 arrangements and non-employee director plans presently maintained by KT
 which provide for grants of equity-based awards shall be amended or
 converted into a similar instrument of Parent, in each case with such
 adjustments to the terms of such KT Awards as are appropriate to preserve
 the value inherent in such KT Awards with no detrimental effects on the
 holders thereof.  The other terms of each KT Award, and the plans or
 agreements under which they were issued, shall continue to apply in
 accordance with their terms, including any provisions providing for
 acceleration of vesting or payment.  With respect to any restricted stock
 awards as to which the restrictions shall have lapsed on or prior to the KT
 Effective Time in accordance with the terms of the applicable plans or
 award agreements, shares of such previously restricted stock shall be
 converted in accordance with the provisions of Section 2.1(b).

           (c)  KT agrees that each of its employee incentive or benefit
 plans, programs and arrangements and non-employee director plans shall be
 amended, to the extent necessary and appropriate, to reflect the
 transactions contemplated by this Agreement, including, but not limited to
 the conversion of shares of KT Class A Common Stock held or to be awarded
 or paid pursuant to such benefit plans, programs or arrangements into
 shares of Parent Common Stock on a basis consistent with the transactions
 contemplated by this Agreement.  At or prior to the KT Effective Time,
 Parent shall take all corporate action necessary to reserve for issuance a
 sufficient number of shares of Parent Common Stock for delivery upon
 exercise of the KT Stock Options.  As soon as practicable after the KT
 Effective Time, Parent shall either (i) file one or more  registration
 statements on Form S-1, Form S-3 or Form S-8, as the case may be (or any
 successor or other appropriate forms), or (ii) take such action as is
 required under Rule 414 under the Securities Act (or any successor
 provision) to permit Parent to succeed to the existing registration
 statement on Form S-8 of KT, in each case, with respect to the Parent
 Common Stock subject to such KT Stock Options, and shall maintain the
 effectiveness of such registration statements and the current status of the
 prospectus or prospectuses contained therein, for so long as such KT Stock
 Options remain outstanding.

           Section 5.7  Filings; Other Action. Subject to the terms and
 conditions herein provided, AH and KT shall (a) promptly make all filings
 necessary in connection with the Required Statutory Approvals and the KT
 Required Statutory Approvals (including, without limitation, filing the
 notifications provided for under the Hart-Scott-Rodino Antitrust
 Improvements Act of 1976, as amended (the "HSR Act")), (b) use reasonable
 efforts to cooperate with one another in (i) determining whether any
 filings are required to be made with, or consents, permits, authorizations
 or approvals are required to be obtained from, any third party or other
 governmental or regulatory bodies or authorities of federal, state, local
 and foreign jurisdictions in connection with the execution and delivery of
 this Agreement and the consummation of the transactions contemplated hereby
 and thereby and (ii) timely making all such filings and timely seeking all
 such consents, permits, authorizations or approvals, including the Required
 Third Party Consents and the KT Required Third Party Consents, and (c) use
 reasonable best efforts to take, or cause to be taken, all other actions
 and do, or cause to be done, all other things necessary, proper or
 advisable to consummate and make effective the transactions contemplated
 hereby.  Without limiting the foregoing, each of the parties shall take all
 necessary action to cause the expiration of the notice periods under the
 HSR Act with respect to the Mergers as promptly as reasonably practicable
 after the date of this Agreement.

           Section 5.8  Further Assurances.  Subject to the terms and
 conditions provided in this Agreement and to applicable legal requirements,
 each of the parties hereto agrees to use its best efforts, in the case of
 KT consistent with the fiduciary duties of KT's Board of Directors, to
 take, or cause to be taken, all action, and to do, or cause to be done, and
 to assist and cooperate with the other parties hereto in doing, as promptly
 as practicable, all things necessary, proper or advisable under applicable
 Laws to ensure that the conditions set forth in Article VI are satisfied
 and to consummate and make effective the transactions contemplated by this
 Agreement.  In case at any time after the Effective Time any further action
 is necessary or desirable to carry out the purposes of this Agreement, the
 proper officers and directors of each of the parties to this Agreement
 shall take all such necessary action.

           Section 5.9  Notification of Certain Matters.  AH and the
 Members, on the one hand, and KT, on the other hand, shall promptly notify
 each other of (a) the occurrence or non-occurrence of any fact or event
 which could reasonably be expected (i) to cause any representation or
 warranty contained in this Agreement to be untrue or inaccurate in any
 material respect at any time from the date hereof to the Effective Time,
 (ii) to cause any material covenant, condition or agreement hereunder not
 to be complied with or satisfied in all material respects or (iii) to
 result in, in the case of AH, a Material Adverse Effect on AH, and, in the
 case of KT, a Material Adverse Effect on KT, (b) any failure of AH or KT,
 as the case may be, to comply with or satisfy any covenant, condition or
 agreement to be complied with or satisfied by it hereunder in any material
 respect; provided, however, that no such notification shall affect the
 representations or warranties of any party or the conditions to the
 obligations of any party hereunder, (c) any notice or other material
 communications from any Governmental Entity in connection with the
 transactions contemplated by this Agreement, and (d) the commencement of
 any suit, action or proceeding that seeks to prevent or seek damages in
 respect of, or otherwise relates to, the consummation of the transactions
 contemplated by this Agreement.

           Section 5.10  No Solicitation by AH.

           (a)  AH shall not, nor shall it authorize or permit any of its
 Subsidiaries to, authorize or permit any of its directors, officers,
 employees or affiliates or any investment banker, financial advisor,
 attorney, accountant or other representative retained by it or any of its
 Subsidiaries to, directly or indirectly through another person, (i)
 solicit, initiate or encourage (including by way of furnishing
 information), or take any other action designed to facilitate or encourage,
 any inquiries or the making of any proposal which constitutes any Takeover
 Proposal (as defined below) (or could be expected to lead to a Takeover
 Proposal) or (ii) participate in any discussions or negotiations regarding
 any Takeover Proposal.  For purposes of this Agreement, "Takeover Proposal"
 means any inquiry, proposal or offer (or any improvement, restatement,
 amendment, renewal or reiteration thereof) from any person relating to any
 direct or indirect acquisition or purchase of a business, material assets
 or any equity securities or interests of AH or any of its Subsidiaries, any
 tender offer or exchange offer that if consummated would result in any
 person beneficially owning any equity securities or interests of AH or any
 of its Subsidiaries, any merger, consolidation, business combination,
 recapitalization, liquidation, dissolution or similar transaction involving
 AH or any of its Subsidiaries, or any other transaction the consummation of
 which could reasonably be expected to impede, interfere with, prevent or
 delay the transactions contemplated hereby or which could reasonably be
 expected to dilute the benefits to Parent and KT of the transactions
 contemplated hereby, in each case other than the transactions contemplated
 by this Agreement.

           (b)  In addition to the obligations of AH set forth in paragraph
 (a) of this Section 5.10, AH shall immediately advise KT orally and in
 writing of any request for information or of any Takeover Proposal, the
 material terms and conditions of such request or Takeover Proposal and the
 identity of the person making such request or Takeover Proposal.  AH will
 promptly keep Parent and KT informed of the status and details (including
 amendments or proposed amendments) of any such request or Takeover
 Proposal.

           (c)  Immediately after the execution and delivery of this
 Agreement, AH will, and will cause its Subsidiaries and affiliates, and
 their respective directors, officers, employees, investment bankers,
 financial advisors, attorneys, accountants and other representatives to,
 cease and terminate any existing activities, discussions or negotiations
 with any parties conducted heretofore with respect to any possible Takeover
 Proposal.  AH agrees that it will take the necessary steps to promptly
 inform the individuals or entities referred to in the first sentence of
 Section 5.10(a) of the obligations undertaken in this Section  5.10.

           (d)  The Members of AH have resolved by unanimous written consent
 to adopt and approve this Agreement and the Mergers.

           Section 5.11  Public Announcement.  From and after the date of
 this Agreement until the Effective Time or the Termination Date, AH and KT
 will, to the extent practicable, consult with and provide each other the
 reasonable opportunity to review and comment upon any press release
 relating to AH and the transactions contemplated by this Agreement prior to
 the issuance of such press release and shall not issue such press release
 prior to such consultation except as may be required by Law or by
 obligations pursuant to any agreement with any national securities exchange
 or quotation system.

           Section 5.12  Indemnification and Insurance.

           (a)  Parent agrees that all rights to exculpation and
 indemnification for acts or omissions occurring prior to the AH Effective
 Time now existing in favor of the current or former members or officers of
 AH (the "AH Indemnified Parties") as provided in its organizational
 documents or in any agreement shall survive the AH Merger and shall
 continue in full force and effect in accordance with their terms.  For six
 years from the Effective Time, Parent shall indemnify the AH Indemnified
 Parties to the same extent as such AH Indemnified Parties are entitled to
 indemnification pursuant to the preceding sentence.

           (b)  For three years from the Effective Time, Parent shall
 maintain in effect AH's current members' and officers' liability insurance
 policy (the "AH Policy") covering those persons who are currently covered
 by the AH Policy (a copy of which has been heretofore delivered to Parent
 and KT); provided, however, that in no event shall Parent be required to
 expend in any one year an amount in excess of 150% of the annual premiums
 currently paid by AH for such insurance, and, provided, further, that if
 the annual premiums of such insurance coverage exceed such amount, Parent
 shall be obligated to obtain a policy with the greatest coverage available
 for a cost not exceeding such amount; and provided, further, that Parent
 may meet its obligations under this paragraph by covering the above people
 under Parent's or one of its Significant Subsidiaries' insurance policy or
 policies on the terms described above.

           (c)  Parent agrees that all rights to exculpation and
 indemnification for acts or omissions occurring prior to the KT Effective
 Time now existing in favor of the current or former directors or officers
 of KT (the "KT Indemnified Parties") as provided in its charter or bylaws
 or in any agreement shall survive the KT Merger and shall continue in full
 force and effect in accordance with their terms.  For six years from the KT
 Effective Time, Parent shall indemnify the KT Indemnified Parties to the
 same extent as such KT Indemnified Parties are entitled to indemnification
 pursuant to the preceding sentence.

           (d)  For three years from the KT Effective Time, Parent shall
 maintain in effect KT's current directors' and officers' liability
 insurance policy (the "KT Policy"), covering those persons who are covered
 by the KT Policy (a copy of which has been heretofore delivered to Parent
 and AH); provided, however, that in no event shall Parent be required to
 expend in any one year an amount in excess of 150% of the annual premiums
 to be paid by KT for such insurance, and, provided, further, that if the
 annual premiums of such insurance coverage exceed such amount, Parent shall
 be obligated to obtain a policy with the greatest coverage available for a
 cost not exceeding such amount; and provided, further, that Parent may meet
 its obligations under this paragraph by covering the above people under
 Parent's or one of its Significant Subsidiaries' insurance policy or
 policies on the terms described above.

           Section 5.13  Section 16(b).  KT and Parent shall take all steps
 reasonably necessary to cause the transactions contemplated hereby and any
 other dispositions of equity securities of KT (including derivative
 securities) or acquisitions of Parent equity securities (including
 derivative securities) in connection with this Agreement by each individual
 who (a) is a director or officer of KT or (b) at the KT Effective Time,
 will become a director or officer of Parent, to be exempt under Rule 16b-3
 promulgated under the Exchange Act.

           Section 5.14  Members' Non-Compete.

           (a)  Each of the Members acknowledges that the covenants in this
 Section 5.14 are an essential element of the Mergers and a fundamental
 inducement to Parent to enter into this Agreement.  Moreover, each of the
 Members acknowledges that the business of AH or KT is or can be conducted
 in any location throughout the United States, Europe or anywhere else in
 the world.

           (b)  Without the express prior written consent of Parent, none of
 the Members shall, at any time during the five-year period immediately
 following the AH Closing Date, directly or indirectly, engage in, or
 otherwise directly or indirectly be employed by or act as a consultant or
 lender to, or be a director, officer, principal, agent, stockholder,
 member, owner or partner of, or permit his name to be used in connection
 with the activities of, or be related to or otherwise affiliated in any
 manner with, any other business or organization anywhere in the world which
 competes, directly or indirectly, with the business of AH or KT; provided,
 that the foregoing shall not prohibit (i) the Members from, individually or
 collectively, owning as a passive investment 5% or less of the equity of
 any publicly-traded entity or (ii) each Member from providing investment
 consulting services to such Member and the members of his family (and
 employing up to five individuals in trading activities related thereto), in
 the case of clause (ii), to the extent that such provision or employment
 does not violate or interfere with any obligations of such Member to Parent
 or any of its Subsidiaries.

           (c)  If it is ever held that the restriction placed on any Member
 by this Section 5.14 is too onerous and is not necessary for the protection
 of the other party or parties hereto, each party to this Agreement agrees
 that any court of competent jurisdiction may impose lesser restrictions
 which such court may consider to be necessary or appropriate to properly
 protect the other party of parties hereto.

           Section 5.15  Non-Solicitation of Employees.

           (a)  Each of the Members acknowledges that the covenants in this
 Section 5.15 are an essential element of the Mergers and a fundamental
 inducement to Parent to enter into this Agreement.

           (b)  From and after the date hereof, none of the Members shall,
 without the express prior written consent of Parent, for a period of five
 (5) years from the AH Closing Date, directly or indirectly solicit,
 encourage, entice or induce any person who is an employee or consultant of
 AH or any of its Subsidiaries at or subsequent to the date hereof, to
 terminate his or her employment or consultancy with Parent or any of its
 Subsidiaries or directly or indirectly hire or employ any person who is an
 employee or consultant of AH or any of the Subsidiaries at the date hereof
 or who become an employee or consultant of AH or any of the Subsidiaries
 after the date hereof; provided, that the foregoing shall not in any manner
 restrict managerial determinations regarding employment matters by Members
 who are then employees of Parent or any of its Subsidiaries.

           (c)  If it is ever held that the restriction placed on any Member
 by this Section 5.15 is too onerous and is not necessary for the protection
 of the other party or parties hereto, each party to this Agreement agrees
 that any court of competent jurisdiction may impose lesser restrictions
 which such court may consider to be necessary or appropriate to properly
 protect the other party or parties hereto.

           Section 5.16  Pooling Letters.  Each of AH and KT will use its
 reasonable best efforts to cause its respective independent public
 accountants to deliver a customary "pooling-of-interests" letter, dated as
 of the AH Closing Date.

           Section 5.17  Resale Registration.  Upon written request by the
 Members, Parent shall use its reasonable best efforts to cause to become
 effective, as soon as reasonably practicable after receipt of such request
 (but in no event prior to the expiration of the Pooling Period (as defined
 in the Affiliate Letter)), one shelf registration statement on Form S-3 for
 the purpose of permitting resale (in accordance with the methods of
 distribution reasonably requested by the Members) of up to 2,500,000 shares
 of Parent Common Stock received pursuant hereto by the Members (to be
 allocated pro rata among the Members or pursuant to such other allocation
 agreed upon by the Members). The effectiveness of the Registration
 Statement shall be maintained for so long as is necessary after the
 Effective Time in order to permit such resales by the relevant Members, but
 in no event beyond the first anniversary of the AH Effective Time.  The
 obligations of Parent to cause or maintain the effectiveness of such
 registration statement and the ability of the relevant Members to execute
 any transaction pursuant to such registration statement shall be subject to
 reasonable delay if the Board of Directors and/or President of Parent
 reasonably and in good faith determines that such effectiveness would (i)
 require the disclosure of material information that the Company has a bona
 fide business purpose for preserving as confidential or (ii) materially
 interfere in a pending material transaction involving Parent and/or its
 Subsidiaries.


                                 ARTICLE VI
                          CONDITIONS TO THE MERGERS

           Section 6.1  Conditions to Each Party's Obligation to Effect the
 Mergers.  The respective obligations of each party to effect the Mergers
 shall be subject to the fulfillment at or prior to the KT Effective Time
 and the AH Effective Time, as applicable, of the following conditions:

           (a)  No statute, rule, regulation, executive order, decree,
 ruling or injunction shall have been enacted, entered, promulgated or
 enforced by any United States federal or state court or governmental body
 which prohibits the consummation of the Mergers and which remains in
 effect.

           (b)  The shares of Parent Common Stock issuable in the Mergers
 shall have been approved for quotation on the NMS, subject only to official
 notice of issuance.

           (c)  (i)  Any applicable waiting period under the HSR Act shall
 have expired or been terminated and (ii) any other Required Statutory
 Approval and KT Required Statutory Approval shall have been granted or
 obtained.

           Section 6.2  Conditions to Obligations of AH to Effect the AH
 Merger.  The obligation of AH to effect the AH Merger is further subject to
 the conditions that:

           (a)  The representations and warranties of KT set forth herein
 shall be true and correct both when made and at and as of the KT Effective
 Time and, in the case of Sections 4.5 and 4.8, at and as of the AH
 Effective Time, as if made at and as of such times (except to the extent
 expressly made as of an earlier date, in which case as of such date).

           (b)  KT shall have performed in all material respects all
 obligations and complied in all material respects with all covenants
 required by this Agreement to be performed or complied with by it prior to
 the AH Effective Time.

           (c)  KT shall have delivered to AH a certificate, dated the AH
 Effective Time and signed by its President and Chief Executive Officer,
 certifying to the effects of Section 6.2(a) and Section 6.2(b).

           (d)  All third party consents or approvals required to be
 obtained under any KT Agreement, the failure of which to obtain prior to
 the AH Effective Time could reasonably be expected, individually or in the
 aggregate, to materially impair the ability of KT to perform its
 obligations under this Agreement or consummate the Mergers or the other
 transactions contemplated hereby, shall have been obtained.

           Section 6.3  Conditions to Obligations of KT to Effect the KT
 Merger and of Parent to Effect the AH Merger.  The obligations of KT to
 effect the KT Merger (other than those conditions that by their nature are
 to be satisfied at the AH Closing, but which are reasonably expected by the
 parties to be so satisfied) and of Parent to effect the AH Merger are
 further subject to the conditions that:

           (a)  The representations and warranties of each of AH and the
 Members set forth herein shall be true and correct both when made and at
 and as of the AH Effective Time, as if made at and as of such times (except
 to the extent expressly made as of an earlier date, in which case as of
 such date).

           (b)  Each of AH and the Members shall have performed in all
 material respects all obligations and complied in all material respects
 with all covenants required by this Agreement to be performed or complied
 with by it prior to the AH Effective Time.

           (c)  The total Net Assets reflected on the unaudited consolidated
 statement of financial condition of AH as of the AH Closing Date shall be
 at least $38.0 million.

           (d)  AH and the Members shall have delivered to KT a certificate,
 dated the AH Effective Time and signed by AH's Chief Executive Officer and
 each of the Members, certifying to the effects of Section 6.3(a), (b) and
 (c) above.

           (e)  All Required Third Party Consents shall have been obtained.

           (f)  Parent and KT shall have received a letter, dated the AH
 Closing Date, from PricewaterhouseCoopers LLP and addressed to Parent and
 KT, in form and substance reasonably satisfactory to KT, that the Mergers
 can properly be accounted for as a "pooling-of-interests" transaction.

           (g)  Each Member shall have delivered to Parent and KT a
 certificate as contemplated under and meeting the requirements of Section
 1.1445-2(b)(2)(i) of the Treasury regulations, to the effect that such
 Member is not a "foreign person" within the meaning of the Code and
 applicable Treasury regulations.

           (h)  Parent and the Members shall have entered into the Escrow
 Indemnity Agreement to secure certain indemnification obligations of the
 Members pursuant to Article VIII hereof and, contemporaneously with the AH
 Closing, the Members shall have deposited the Escrow Shares with the Escrow
 Agent as required by Section 2.3(g) hereof.

           (i)  Each of the AH Affiliates shall have delivered an Affiliate
 Letter to Parent.

           (j)  The New Employment Agreements entered into between AH and
 each of the Members on the date hereof shall be in full force and effect on
 the AH Closing Date and none of the Members shall have refused to perform
 services under such New Employment Agreements in violation of such
 agreements or be in material breach of such New Employment Agreements, and
 none of Messrs. Irvin Kessler, Efraim Gildor and Peter Hajas shall have
 died or become permanently incapacitated.

           (k)  AH shall have delivered to Parent:  (i) if the AH Effective
 Time is on or prior to January 31, 2000, audited consolidated statements of
 financial condition, income and cash flows of AH at and for the nine months
 ended September 30, 1999, or (ii) if the AH Effective Time is after January
 31, 2000, audited consolidated statements of financial condition, income
 and cash flows of AH at and for the 12 months ended December 31, 1999.


                                 ARTICLE VII
                      TERMINATION, WAIVER AND AMENDMENT

           Section 7.1  Termination or Abandonment.  This Agreement may be
 terminated at any time prior to the AH Effective Time:

           (a)  by the mutual written consent of AH and KT;

           (b)  by either KT or AH if the AH Effective Time shall not have
 occurred on or before September 30, 2000; provided, that the party seeking
 to terminate this Agreement pursuant to this Section 7.1(b) shall not have

 breached in any material respect its obligations under this Agreement in
 any manner that shall have proximately contributed to the failure to
 consummate the Mergers on or before such date;

           (c)  by either KT or AH if (i) a statute, rule, regulation or
 executive order shall have been enacted, entered or promulgated by a United
 States federal or state governmental body prohibiting the consummation of
 the Mergers substantially on the terms contemplated hereby or (ii) an
 order, decree, ruling or injunction shall have been entered by a United
 States federal or state court permanently restraining, enjoining or
 otherwise prohibiting the consummation of the Mergers substantially on the
 terms contemplated hereby and such order, decree, ruling or injunction
 shall have become final and non-appealable;

           (d)  by KT, if AH shall breach Section 5.10;

           (e)  by AH, if there shall have been a material breach by KT of
 any of its representations, warranties, covenants or agreements contained
 in this Agreement such that the conditions set forth in Section 6.2(a) or
 6.2(b) would not be satisfied, and such breach (if curable) shall not have
 been cured within 30 days after notice thereof shall have been received by
 KT; or

           (f)  by KT, if there shall have been a material breach by AH or
 any of the Members of their respective representations, warranties,
 covenants or agreements contained in this Agreement such that the
 conditions set forth in Section 6.3(a) or 6.3(b) would not be satisfied,
 and such breach (if curable) shall not have been cured within 30 days after
 notice thereof shall have been received by AH.

           Section 7.2  Effect of Termination.  In the event of termination
 of this Agreement pursuant to Section 7.1, this Agreement shall terminate
 (except for the provisions of the penultimate sentence of Section 5.2 and
 Sections 7.3 and 9.1), and there shall be no other liability on the part of
 KT, on the one hand, and AH and the Members, on the other hand, to the
 other except liability arising out of a wilful and material breach of this
 Agreement or as provided for in the Confidentiality Agreement.

           Section 7.3  Termination Fee.

           (a)   In the event that (i) this Agreement is terminated by KT
 pursuant to Section 7.1(d), or (ii) this Agreement is terminated by KT
 pursuant to Section 7.1(f) as a result of any wilful and material breach by
 AH or any of its Subsidiaries or any Member of any representation,
 warranty, covenant or agreement set forth in this Agreement, then AH and
 the Members, jointly and severally, shall be obligated to promptly pay to
 KT a fee equal to $10.0 million; provided, that if within twelve (12)
 months after the date this Agreement is terminated under circumstances
 described in clause (i) or (ii) above, AH, any of its Subsidiaries, any of
 the Members or any of their respective affiliates enters into any letter of
 intent, agreement in principle, acquisition agreement or other agreement
 related to any Takeover Proposal or a Takeover Proposal is consummated with
 any third party, then AH and the Members, jointly and severally, shall be
 obligated to pay to KT an additional fee equal to $40.0 million (either
 such fee, the "Termination Fee"), in each case payable by wire transfer of
 same day funds.  AH and the Members expressly acknowledge that the
 agreements contained in this Section 7.3(a) are an integral part of the
 transactions contemplated by this Agreement, and that, without these
 agreements, KT would not enter into this Agreement; accordingly, if AH and
 the Members fail promptly to pay the Termination Fee, and, in order to
 obtain such payment, KT commences a suit which results in a judgment
 against AH and/or the Members for the Termination Fee, AH and the Members
 expressly shall be obligated, jointly and severally, to pay to KT its costs
 and expenses (including attorneys' fees and expenses) in connection with
 such suit, together with interest on the amount of the Termination Fee at
 the prime rate of Citibank N.A. in effect on the date such payment was
 required to be made.

           (b)  In the event that this Agreement is terminated by AH
 pursuant to Section 7.1(e) as a result of any wilful and material breach by
 KT or any of its Subsidiaries of any representation, warranty, covenant or
 agreement set forth in this Agreement, then KT shall be obligated to
 promptly pay to AH a fee equal to $10.0 million (the "KT Termination Fee"),
 payable by wire transfer of same day funds.  KT expressly acknowledges that
 the agreements contained in this Section 7.3(b) are an integral part of the
 transactions contemplated by this Agreement, and that, without these
 agreements, AH would not enter into this Agreement; accordingly, if KT
 fails promptly to pay the KT Termination Fee, and, in order to obtain such
 payment, AH commences a suit which results in a judgment against KT for the
 KT Termination Fee, KT expressly shall be obligated to pay to AH its costs
 and expenses (including attorneys' fees and expenses) in connection with
 such suit, together with interest on the amount of the KT Termination Fee
 at the prime rate of Citibank N.A. in effect on the date such payment was
 required to be made.

           (c)  The payment of any fee pursuant to this Section 7.3 shall be
 made to an account designated in writing by the party entitled to receive
 such fee.

           Section 7.4  Amendment or Supplement.  At any time prior to the
 Effective Time, this Agreement may be amended or supplemented in writing by
 the parties with respect to any of the terms contained in this Agreement.

           Section 7.5  Extension of Time, Waiver, Etc.  At any time prior
 to the Effective Time, any party may:

           (a)  extend the time for the performance of any of the
 obligations or acts of any other party;

           (b)  waive any inaccuracies in the representations and warranties
 of any other party contained herein or in any document delivered pursuant
 hereto; or

           (c)  subject to the proviso of Section 7.4, waive compliance with
 any of the agreements or conditions of the other party contained herein.

 Notwithstanding the foregoing no failure or delay by any party in
 exercising any right hereunder shall operate as a waiver thereof nor shall
 any single or partial exercise thereof preclude any other or further
 exercise thereof or the exercise of any other right hereunder.  Any
 agreement on the part of a party hereto to any such extension or waiver
 shall be valid only if set forth in an instrument in writing signed on
 behalf of such party.


                                ARTICLE VIII
                               INDEMNIFICATION

           Section 8.1  Indemnification by the Members.  Subject to Section
 8.3 below and the terms of the Escrow Indemnity Agreement, each of the
 Members shall jointly and severally indemnify Parent and its Subsidiaries
 and their respective successors and permitted assigns and their respective
 officers, directors, employees, agents and affiliates (other than the
 Members and their affiliates) (collectively, the "Parent Indemnified
 Parties") from and against and shall reimburse the same for and in respect
 of any and all losses, reasonable costs, fines, liabilities, claims,
 penalties, damages and reasonable expenses (including all legal fees and
 expenses) of any nature or kind (collectively "Losses") which may be
 claimed or assessed against any of them or to which any of them may be
 subject, in connection with any and all claims, suits or asserted Losses
 which are related to the inaccuracy or incompleteness of any representation
 or warranty made by AH or any of the Members that is contained in or made
 pursuant to Article III of this Agreement, any breach of any agreement or
 covenant of AH or any of the Members contained in this Agreement, or any
 claim of any former member of AH arising out of this Agreement and any
 agreements executed in connection herewith and the transactions
 contemplated hereby and thereby.  Notwithstanding the preceding sentence,
 the Members shall not be obligated under this Article VIII to indemnify the
 Parent Indemnified Parties in respect of trading losses resulting from the
 ordinary course of business trading activities.

           Section 8.2  Indemnification Procedures.

           (a)  Notice.   A party entitled to indemnification under this
 Article VIII (an "Indemnified Party") agrees to give each party obligated
 to provide indemnification pursuant to this Article VIII (an "Indemnifying
 Party") prompt written notice (the "Claim Notice") of any claim, assertion,
 event, condition or proceeding by or in respect of any third party (each, a
 "Third Party Claim") of which it has knowledge concerning any liability or
 damage as to which it may request indemnification hereunder.  The Claim
 Notice shall describe in reasonable detail the nature of the claim,
 including an estimate, if practicable, of the amount of Losses that have
 been or may be suffered or incurred by the Indemnified Party attributable
 to such claim and the basis of the Indemnified Party's request for
 indemnification under this Agreement.

           (b)  Conduct of Defense.   An Indemnifying Party shall have the
 right, upon written notice to the Indemnified Party (the "Defense Notice")
 within ten business days of its receipt from the Indemnified Party of the
 Claim Notice, to conduct at its expense the defense against such Third
 Party Claim in its own name, or, if necessary, in the name of the
 Indemnified Party. When the Indemnifying Party assumes the defense, the
 Indemnified Party shall have the right to reasonably approve the defense
 counsel and no such claim may be compromised or settled without the express
 prior written consent of the Indemnified Party; provided, however, that in
 any case in which the Indemnified Party withholds consent to any such
 proposed compromise or settlement, thereafter the maximum liability of the
 Indemnifying Party under this Article VIII to such Indemnified Party with
 respect to the relevant Third Party Claim shall not exceed the amounts set
 forth in such proposed compromise or settlement.  In the event that the
 Indemnifying Party does deliver a Defense Notice and thereby elects to
 conduct the defense of such Third Party Claim, the Indemnified Party will
 cooperate with and make available to the Indemnifying Party such
 assistance, personnel, witnesses and materials as the Indemnifying Party
 may reasonably request.  Regardless of which party defends such Third Party
 Claim, the other party shall have the right at its expense to participate
 in the defense assisted by counsel of its own choosing. In the event that
 the Indemnifying Party shall fail to give the Defense Notice within the
 time prescribed by Section 8.2(b), the Indemnified Party shall have the
 sole right to conduct such defense and the Indemnified Party may pay,
 compromise or defend such claim or proceeding at the Indemnifying Party's
 expense.  In the event any Indemnified Party should have a claim against
 any Indemnifying Party hereunder which does not involve a Third Party
 Claim, the Indemnified Party shall promptly transmit to the Indemnifying
 Party a written notice describing in reasonable detail the nature of the
 claim and the basis of the Indemnified Party's request for indemnification
 under this Agreement.

           Section 8.3  Limitations on Indemnification.  Any liabilities of
 the Members pursuant to this Article VIII shall be satisfied pursuant to
 the terms of the Escrow Indemnity Agreement, which shall be the exclusive
 remedy available for satisfaction of any obligation of the Members pursuant
 to this Article VIII.  Notwithstanding anything to the contrary in the
 charter, bylaws, other organizational documents, agreements (including,
 without limitation, the New Employment Agreements), insurance policies
 (including, without limitation, any directors' and officers' liability or
 other similar insurance policy) or other instruments of Parent or any of
 its Subsidiaries, no Member (or any of their respective affiliates) shall
 have any right to indemnification or other recovery thereunder or otherwise
 (whether as an officer, member, director, stockholder or in any other
 capacity) from Parent or any of its Subsidiaries with respect to any matter
 to the extent that the Members are liable, or would be liable but for the
 limitations on indemnification and limitations on survival of
 representations, warranties, covenants and agreements contained herein, to
 any of the Parent Indemnified Parties under this Article VIII with respect
 to such matter.  The Members shall not be obligated to indemnify any of the
 Parent Indemnified Parties pursuant to this Article VIII until the
 aggregate Losses suffered by the Parent Indemnified Parties exceed $1.0
 million, except to the extent that such Losses result from a wilful breach
 of a representation, warranty, agreement or covenant of AH or any of the
 Members; provided, however, that if at any time the aggregate Losses exceed
 $1.0 million, the Members shall be obligated to indemnify the relevant
 Parent Indemnified Parties for the full amount of such Losses in excess of
 $500,000.

           Section 8.4  Survival of Representations, Warranties and
 Covenants.  The representations and warranties of AH and the Members
 contained in Article III hereof shall survive until the first anniversary
 of the AH Effective Time (the "Expiration Date"), and no party may seek
 indemnification under this Article VIII with respect to a breach of such a
 representation or warranty after the Expiration Date.  Notwithstanding
 anything to the contrary contained herein, all representations and
 warranties made by AH and the Members pursuant to Article III of this
 Agreement, and the liability with respect thereto, shall not terminate with
 respect to any claim, whether or not fixed as to liability or liquidated as
 to amount, with respect to which such party has been given written notice
 stating the nature of the claim prior to the date on which such
 representation or warranty expires.  The parties' respective covenants and
 agreements contained in this Agreement or in any certificate, schedule,
 list, exhibit, agreement, document or other writing delivered pursuant
 hereto or in connection with the transactions contemplated hereby shall
 survive indefinitely unless otherwise set forth herein or therein;
 provided, however, that no party may seek indemnification under this
 Article VIII with respect to any breach of such a covenant or agreement
 after the Expiration Date, except with respect to any claim, whether or not
 fixed as to liability or liquidated as to amount, with respect to which
 such party has given written notice stating the nature of the claim prior
 to the Expiration Date.  Notwithstanding anything to the contrary in this
 Agreement, (a) no investigation by a party shall affect the
 representations, warranties, covenants and agreements of the other parties
 under this Agreement or in any certificate, schedule, list, exhibit,
 agreement, document or other writing delivered pursuant hereto or in
 connection with the transactions contemplated hereby furnished or to be
 furnished to the other parties and (b) such representations, warranties,
 covenants and agreements shall not be affected or deemed waived by reason
 of the consummation of the Mergers or of the fact that the other party or
 parties knew or should have known that any of the same is or might be
 inaccurate in any respect.


                                 ARTICLE IX

                                MISCELLANEOUS

           Section 9.1  Expenses.  Whether or not the Mergers are
 consummated, all costs and expenses incurred by AH, its Subsidiaries and
 the Members in connection with the Mergers, this Agreement and the
 transactions contemplated hereby (including, without limitations, all fees
 and expenses of Goldman, Sachs & Co., Ernst & Young LLP, and Latham &
 Watkins), shall be paid by AH and all costs and expenses incurred by KT and
 its Subsidiaries in connection with the Mergers, this Agreement and the
 transactions contemplated hereby shall be paid by KT.

           Section 9.2  Counterparts; Effectiveness.  This Agreement may be
 executed in two or more consecutive counterparts, each of which shall be an
 original, with the same effect as if the signatures thereto and hereto were
 upon the same instrument, and shall become effective when one or more
 counterparts have been signed by each of the parties and delivered (by
 telecopy or otherwise) to the other parties.

           Section 9.3  Governing Law and Venue; Waiver of Jury Trail.

           (a)  THIS AGREEMENT SHALL BE DEEMED TO BE MADE IN AND IN ALL
 RESPECTS SHALL BE INTERPRETED, CONSTRUED AND GOVERNED BY AND IN ACCORDANCE
 WITH THE LAW OF THE STATE OF DELAWARE WITHOUT REGARD TO THE CONFLICT OF LAW
 PRINCIPLES.  The parties irrevocably submit to the jurisdiction of the
 courts of the State of Delaware solely in respect of the interpretation and
 enforcement of the provisions of this Agreement and of the documents
 referred to in this Agreement, and in respect of the transactions
 contemplated by this Agreement and by those documents, and hereby waive,
 and agree not to assert, as a defense in any action, suit or proceeding for
 the interpretation or enforcement of this Agreement or of any such
 document, that it is not subject to this Agreement or that such action,
 suit or proceeding may not be brought or is not maintainable in said courts
 or that the venue thereof may not be appropriate or that this Agreement or
 any such document may not be enforced in or by such courts, and the parties
 hereto irrevocably agree that all claims with respect to such action or
 proceeding shall be heard and determined in such a court.  The parties
 hereby consent to and grant any such court jurisdiction over the person of
 such parties and over the subject matter of such dispute and agree that
 mailing of process or other papers in connection with any such action or
 proceeding in the manner provided in Section 9.4 or in such other manner as
 may be permitted by Law, shall be valid and sufficient service thereof.

           (b)  EACH PARTY ACKNOWLEDGES AND AGREES THAT ANY CONTROVERSY
 WHICH MAY ARISE UNDER THIS AGREEMENT IS LIKELY TO INVOLVE COMPLICATED AND
 DIFFICULT ISSUES, AND THEREFORE EACH SUCH PARTY HEREBY IRREVOCABLY AND
 UNCONDITIONALLY WAIVES ANY RIGHT SUCH PARTY MAY HAVE TO A TRIAL BY JURY IN
 RESPECT OF ANY LITIGATION DIRECTLY OR INDIRECTLY ARISING OUT OF OR RELATING
 TO THIS AGREEMENT, OR THE TRANSACTIONS CONTEMPLATED BY THIS AGREEMENT.
 EACH PARTY CERTIFIES AND ACKNOWLEDGES THAT (i) NO REPRESENTATIVE, AGENT OR
 ATTORNEY OF ANY OTHER PARTY HAS REPRESENTED, EXPRESSLY OR OTHERWISE, THAT
 SUCH OTHER PARTY WOULD NOT, IN THE EVENT OF LITIGATION, SEEK TO ENFORCE THE
 FOREGOING WAIVER, (ii) EACH SUCH PARTY UNDERSTANDS AND HAS CONSIDERED THE
 IMPLICATIONS OF THIS WAIVER, (iii) EACH SUCH PARTY MAKES THIS WAIVER
 VOLUNTARILY, AND (iv) EACH SUCH PARTY HAS BEEN INDUCED TO ENTER INTO THIS
 AGREEMENT BY, AMONG OTHER THINGS, THE MUTUAL WAIVERS AND CERTIFICATIONS IN
 THIS SECTION 9.3.

           Section 9.4  Notices.  All notices and other communications
 hereunder shall be in writing (including telecopy or similar writing) and
 shall be effective (a) if given by telecopy, when such telecopy is
 transmitted to the telecopy number specified in this Section 9.4 and the
 appropriate telecopy confirmation is received or (b) if given by any other
 means, when delivered at the address specified in this Section 9.4:

           To KT, Parent, SubKT or SubAH:

                Knight/Trimark Group, Inc.
                Newport Tower
                525 Washington Blvd.
                Jersey City, New Jersey 07310
                Attention: Michael Dorsey, Esq.
                Telecopy: (201) 222-1799

           copy to:

                Skadden, Arps, Slate, Meagher & Flom LLP
                919 Third Avenue
                New York, New York 10022
                Attention: Morris J. Kramer, Esq.
                Telecopy:  (212) 735-2000

           To AH or the Members:

                Arbitrade Holdings LLC
                130 Cheshire Lane
                Minnetonka, Minnesota 55305
                Attention: Colin Lancaster, Esq.
                Telecopy:  (612) 249-5399

           copy to:

                Latham & Watkins
                233 S. Wacker Drive, Suite 5800
                Chicago, Illinois  60606
                Attention: Michael D. Levin, Esq.
                Telecopy:  (312) 993-9767

           Section 9.5  Assignment; Binding Effect.  Neither this Agreement
 nor any of the rights, interests or obligations hereunder shall be assigned
 by any of the parties hereto (whether by operation of Law or otherwise)
 without the express prior written consent of the other parties; provided,
 however, that Parent may assign its rights under Sections 5.14 and 5.15 and
 Article VIII of this Agreement in connection with direct or indirect sale
 or other disposition of a business, material assets or any equity
 securities or interests of Parent or any of its Subsidiaries, or any
 merger, consolidation, business combination, recapitalization, liquidation,
 dissolution or similar transaction involving Parent or any of its
 Significant Subsidiaries.  Subject to the preceding sentence, this
 Agreement shall be binding upon and shall inure to the benefit of the
 parties hereto and their respective successors and assigns.

           Section 9.6  Severability.  Any term or provision of this
 Agreement which is invalid or unenforceable in any jurisdiction shall, as
 to that jurisdiction, be ineffective to the extent of such invalidity or
 unenforceability without rendering invalid or unenforceable the remaining
 terms and provisions of this Agreement in any other jurisdiction.  If any
 provision of this Agreement is so broad as to be unenforceable, such
 provision shall be interpreted to be only so broad as is enforceable.

           Section 9.7  Enforcement of Agreement.  The parties hereto agree
 that money damages or other remedy at law would not be sufficient or
 adequate remedy for any breach or violation of, or a default under, this
 Agreement by them and that in addition to all other remedies available to
 them, each of them shall be entitled to the fullest extent permitted by Law
 to an injunction restraining such breach, violation or default or
 threatened breach, violation or default and to any other equitable relief,
 including, without limitation, specific performance, without bond or other
 security being required.

           Section 9.8  Entire Agreement; No Third-Party Beneficiaries.
 This Agreement (and the exhibits and schedules hereto) and the
 Confidentiality Agreement constitute the entire agreement, and supersede
 all other prior agreements and understandings, both written and oral,
 between the parties, or any of them, with respect to the subject matter
 hereof and thereof and, except for the provisions of Section 5.12 and
 Article VIII hereof and except as set forth in the proviso to the first
 sentence of Section 9.5, is not intended to and shall not confer upon any
 person other than the parties hereto any rights or remedies hereunder.

           Section 9.9  Headings.  Headings of the Articles and Sections of
 this Agreement are for convenience of the parties only, and shall be given
 no substantive or interpretive effect whatsoever.

           Section 9.10  Definitions.  References in this Agreement to
 "Subsidiaries" of any person shall mean (a) any corporation, association,
 partnership, limited liability company or other business entity of which
 more than 50% of the total voting power of shares of capital stock or other
 interests (including partnership interests) entitled (without regard to the
 occurrence of any contingency) to vote in the election of directors,
 managers or trustees thereof is at the time owned or controlled, directly
 or indirectly, by such person,  (b) any limited partnership of which such
 person is a general partner, or (c) any other person (other than a
 corporation or limited partnership) in which such person, directly or
 indirectly, has more than 50% of the outstanding partnership or similar
 interests or has the power, by contract or otherwise, to direct or cause
 the direction of the policies, management and affairs thereof; provided,
 however, that references to Subsidiaries of AH shall not include the
 Private Funds.  For the purposes of Sections 3.1(c), 3.1(d) (other than the
 first sentence thereof), 3.5, 3.6 through  3.8, 3.10, 3.11, 3.13 through
 3.19, 3.21 through 3.24, and 3.26, references in this Agreement to any
 person shall include all predecessors of such person.  References in this
 Agreement (except as specifically otherwise defined) to "affiliates" shall
 mean, as to any person, any other person which, directly or indirectly,
 controls, or is controlled by, or is under common control with, such
 person.  As used in this definition, "control" (including, with its
 correlative meanings, "controlled by" and "under common control with")
 shall mean the possession, directly or indirectly, of the power to direct
 or cause the direction of management or policies of a person, whether
 through the ownership of securities or partnership of other ownership
 interests, by contract or otherwise.  References in this Agreement to a
 "person" shall mean an individual, a corporation, a partnership, a limited
 liability company, an association, a trust or any other entity or
 organization, including, without limitation, a governmental body or
 authority.  Notwithstanding the foregoing, none of Parent, SubKT and SubAH
 shall be deemed to be an "affiliate" or a "Subsidiary" of KT.  References
 in this Agreement to the "knowledge" of AH shall refer to the knowledge of
 each of the Members and the members of senior management of AH and its
 Subsidiaries.  Reference in this Agreement to the "knowledge" of KT shall
 refer to the knowledge of each of the members of senior management of KT
 and its Subsidiaries.

           Section 9.11  Obligations of AH and KT.  Whenever this Agreement
 requires a Subsidiary of AH or a Private Fund to take any action, that
 requirement shall be deemed to include an undertaking on the part of AH to
 cause that Subsidiary or Private Fund to take that action.  Whenever this
 Agreement requires a Subsidiary of KT to take any action, that requirement
 shall be deemed to include an undertaking on the part of KT to cause that
 Subsidiary to take that action.

           IN WITNESS WHEREOF, the parties hereto have caused this Agreement
 to be duly executed and delivered as of the date first above written.


                     KT HOLDING COMPANY


                     By:  /s/ Kenneth D. Pasternak
                          ------------------------------------------------
                          Name:  Kenneth D. Pasternak
                          Title: Chief Executive Officer and President


                     KT ACQUISITION I CORP.


                     By:  /s/ Kenneth D. Pasternak
                          ------------------------------------------------
                          Name: Kenneth D. Pasternak
                          Title: Chief Executive Officer and President


                     AH ACQUISITION I L.L.C.


                     By:  /s/ Kenneth D. Pasternak
                          ------------------------------------------------
                          Name: Kenneth D. Pasternak
                          Title: Chief Executive Officer and President


                     KNIGHT/TRIMARK GROUP, INC.


                     By:  /s/ Kenneth D. Pasternak
                          ------------------------------------------------
                          Name: Kenneth D. Pasternak
                          Title: Chief Executive Officer and President


                     ARBITRADE HOLDINGS LLC


                     By:  /s/ Irvin Kessler
                          ------------------------------------------------
                          Name: Irvin Kessler
                          Title:  Managing Director


                          /s/ Peter Hajas
                          ------------------------------------------------
                          PETER HAJAS


                          /s/ Merrill Ferguson
                          ------------------------------------------------
                          MERRILL FERGUSON


                          /s/ Mark Lyons
                          ------------------------------------------------
                          MARK LYONS


                          /s/ Irvin Kessler
                          ------------------------------------------------
                          TARMACHAN CAPITAL MANAGEMENT, INC.


                          /s/ Irvin Kessler
                          ------------------------------------------------
                          TARMACHAN CAPITAL CO.


                          /s/ Irvin Kessler
                          ------------------------------------------------
                          DEEPHAVEN INC.


                          /s/ Efraim Gildor
                          ------------------------------------------------
                          GILDOR TRADING, INC.


 Other than for
 purposes of Articles I,
 II (except Section
 2.3(g)) and IV:          /s/ Irvin Kessler
                          ------------------------------------------------
                          IRVIN KESSLER


 Other than for
 purposes of Articles I,
 II (except Section
 2.3(g)() and IV:         /s/ Efraim Gildor
                          ------------------------------------------------
                          EFRAIM GILDOR





                             TABLE OF CONTENTS

                                                                        PAGE
                                                                        ----

                                 ARTICLE I

 THE MERGERS; CLOSING  . . . . . . . . . . . . . . . . . . . . . . . . . . 2

 Section 1.1  The KT Merger  . . . . . . . . . . . . . . . . . . . . . . . 2
 Section 1.2  The AH Merger  . . . . . . . . . . . . . . . . . . . . . . . 2
 Section 1.3  KT Closing . . . . . . . . . . . . . . . . . . . . . . . . . 3
 Section 1.4  AH Closing . . . . . . . . . . . . . . . . . . . . . . . . . 3
 Section 1.5  KT Effective Time  . . . . . . . . . . . . . . . . . . . . . 3
 Section 1.6  AH Effective Time  . . . . . . . . . . . . . . . . . . . . . 3
 Section 1.7  Effects of the Mergers . . . . . . . . . . . . . . . . . . . 4
 Section 1.8  Directors  . . . . . . . . . . . . . . . . . . . . . . . . . 5
 Section 1.9  Parent Charter Documents and Name  . . . . . . . . . . . . . 5


                                 ARTICLE II
               EFFECT OF THE MERGERS ON THE EQUITY SECURITIES
                         OF KT AND AH; CERTIFICATES .. . . . . . . . . . . 5

 Section 2.1  Effect on KT Stock and SubKT Stock . . . . . . . . . . . . . 5
 Section 2.2  Effect on AH Membership Units and SubAH Membership Interests 6
 Section 2.3  Exchange of Certificates . . . . . . . . . . . . . . . . . . 7


                                 ARTICLE III
                       REPRESENTATIONS AND WARRANTIES
                            OF AH AND THE MEMBERS  . . . . . . . . . . .  9

 Section 3.1  Organization, Qualification, Etc . . . . . . . . . . . . . . 9
 Section 3.2  Membership Units . . . . . . . . . . . . . . . . . . . . .  10
 Section 3.3  Authority Relative to this Agreement . . . . . . . . . . .  11
 Section 3.4  Non-Contravention; Consents and Approvals  . . . . . . . .  11
 Section 3.5  Financial Statements; Financial Condition  . . . . . . . .  12
 Section 3.6  Environmental Matters. . . . . . . . . . . . . . . . . . .  13
 Section 3.7  Employee Benefit Plans; ERISA. . . . . . . . . . . . . . .  14
 Section 3.8  Tax Matters  . . . . . . . . . . . . . . . . . . . . . . .  17
 Section 3.9  No Undisclosed Material Liabilities  . . . . . . . . . . .  19
 Section 3.10  Labor Relations . . . . . . . . . . . . . . . . . . . . .  19
 Section 3.11  Permits . . . . . . . . . . . . . . . . . . . . . . . . .  19
 Section 3.12  Absence of Certain Changes or Events  . . . . . . . . . .  20
 Section 3.13  No Defaults . . . . . . . . . . . . . . . . . . . . . . .  21
 Section 3.14  Litigation  . . . . . . . . . . . . . . . . . . . . . . .  21
 Section 3.15  Intellectual Property . . . . . . . . . . . . . . . . . .  22
 Section 3.16  Non-Competition Agreements  . . . . . . . . . . . . . . .  24
 Section 3.17  Certain Agreements  . . . . . . . . . . . . . . . . . . .  25
 Section 3.18  Real Property . . . . . . . . . . . . . . . . . . . . . .  25
 Section 3.19  Investment Company Act  . . . . . . . . . . . . . . . . .  25
 Section 3.20  Brokers . . . . . . . . . . . . . . . . . . . . . . . . .  26
 Section 3.21  Certain Representations and Warranties as to Private Funds.26
 Section 3.22  Compliance with Law.  . . . . . . . . . . . . . . . . . .  29
 Section 3.23  Agreements with Regulatory Agencies . . . . . . . . . . .  30
 Section 3.24  Investment Securities.  . . . . . . . . . . . . . . . . .  30
 Section 3.25  Interest Rate Risk Management Instruments.    . . . . . .  30
 Section 3.26  Pooling . . . . . . . . . . . . . . . . . . . . . . . . .  31


                                 ARTICLE IV
                    REPRESENTATIONS AND WARRANTIES OF KT   . . . . . . .  31

 Section 4.1  Organization, Qualification, Etc.  . . . . . . . . . . . .  31
 Section 4.2  Capital Stock  . . . . . . . . . . . . . . . . . . . . . .  32
 Section 4.3  Corporate Authority Relative to this Agreement . . . . . .  33
 Section 4.4  Non-Contravention; Consents and Approvals. . . . . . . . .  34
 Section 4.5  Reports and Financial Statements . . . . . . . . . . . . .  34
 Section 4.6  No Prior Activities  . . . . . . . . . . . . . . . . . . .  35
 Section 4.7  Brokers  . . . . . . . . . . . . . . . . . . . . . . . . .  35
 Section 4.8  Absence of Certain Changes or Events . . . . . . . . . . .  35
 Section 4.9  Pooling  . . . . . . . . . . . . . . . . . . . . . . . . .  36


                                  ARTICLE V
                          COVENANTS AND AGREEMENTS   . . . . . . . . . .  36

 Section 5.1  Conduct of Business Pending the Effective Time . . . . . .  36
 Section 5.2  Investigation  . . . . . . . . . . . . . . . . . . . . . .  39
 Section 5.3  NASDAQ Filings and Other Cooperation . . . . . . . . . . .  39
 Section 5.4  Affiliate Agreements . . . . . . . . . . . . . . . . . . .  40
 Section 5.5  AH Employee Benefit Plans  . . . . . . . . . . . . . . . .  40
 Section 5.6  KT Employee Stock Options, Incentive and Benefit Plans . .  41
 Section 5.7  Filings; Other Action  . . . . . . . . . . . . . . . . . .  42
 Section 5.8  Further Assurances . . . . . . . . . . . . . . . . . . . .  42
 Section 5.9  Notification of Certain Matters  . . . . . . . . . . . . .  43
 Section 5.10  No Solicitation by AH . . . . . . . . . . . . . . . . . .  43
 Section 5.11  Public Announcement . . . . . . . . . . . . . . . . . . .  44
 Section 5.12  Indemnification and Insurance . . . . . . . . . . . . . .  44
 Section 5.13  Section 16(b) . . . . . . . . . . . . . . . . . . . . . .  45
 Section 5.14  Members' Non-Compete  . . . . . . . . . . . . . . . . . .  45
 Section 5.15  Non-Solicitation of Employees . . . . . . . . . . . . . .  46
 Section 5.16  Pooling Letters . . . . . . . . . . . . . . . . . . . . .  47
 Section 5.17  Resale Registration . . . . . . . . . . . . . . . . . . .  47


                                 ARTICLE VI
                          CONDITIONS TO THE MERGERS  . . . . . . . . . .  47

 Section 6.1  Conditions to Each Party's Obligation to Effect the Mergers 47
 Section 6.2  Conditions to Obligations of AH to Effect the AH Merger  .  48
 Section 6.3  Conditions to Obligations of KT to Effect the KT Merger
              and of Parent to Effect the AH Merger . . . . . . . . . . . 48


                                 ARTICLE VII
                      TERMINATION, WAIVER AND AMENDMENT  . . . . . . . .  50

 Section 7.1  Termination or Abandonment . . . . . . . . . . . . . . . .  50
 Section 7.2  Effect of Termination  . . . . . . . . . . . . . . . . . .  50
 Section 7.3  Termination Fee  . . . . . . . . . . . . . . . . . . . . .  51
 Section 7.4  Amendment or Supplement  . . . . . . . . . . . . . . . . .  52
 Section 7.5  Extension of Time, Waiver, Etc.  . . . . . . . . . . . . .  52


                                ARTICLE VIII
                               INDEMNIFICATION . . . . . . . . . . . . .  52

 Section 8.1  Indemnification by the Members . . . . . . . . . . . . . .  52
 Section 8.2  Indemnification Procedures . . . . . . . . . . . . . . . .  53
 Section 8.3  Limitations on Indemnification . . . . . . . . . . . . . .  54
 Section 8.4  Survival of Representations, Warranties and Covenants  . .  54


                                 ARTICLE IX
                                MISCELLANEOUS  . . . . . . . . . . . . .  55

 Section 9.1  Expenses . . . . . . . . . . . . . . . . . . . . . . . . .  55
 Section 9.2  Counterparts; Effectiveness  . . . . . . . . . . . . . . .  55
 Section 9.3  Governing Law and Venue; Waiver of Jury Trail  . . . . . .  55
 Section 9.4  Notices  . . . . . . . . . . . . . . . . . . . . . . . . .  56
 Section 9.5  Assignment; Binding Effect . . . . . . . . . . . . . . . .  57
 Section 9.6  Severability . . . . . . . . . . . . . . . . . . . . . . .  57
 Section 9.7  Enforcement of Agreement . . . . . . . . . . . . . . . . .  57
 Section 9.8  Entire Agreement; No Third-Party Beneficiaries . . . . . .  58
 Section 9.9  Headings . . . . . . . . . . . . . . . . . . . . . . . . .  58
 Section 9.10  Definitions . . . . . . . . . . . . . . . . . . . . . . .  58
 Section 9.11  Obligations of AH and KT  . . . . . . . . . . . . . . . .  59


                           INDEX OF DEFINED TERMS

 Term Section
 Advisers Act  . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.21(h)
 affiliates  . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  9.10
 Affiliate Letters . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.4
 affiliated company  . . . . . . . . . . . . . . . . . . . . . . . . .  3.19
 Agreement . . . . . . . . . . . . . . . . . . . . . . . . . . . .  Preamble
 AH  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  Preamble
 AH Affiliate  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.4
 AH Agreements . . . . . . . . . . . . . . . . . . . . . . . . .  3.4(a)(ii)
 AH Certificate of Merger  . . . . . . . . . . . . . . . . . . . . . . . 1.6
 AH Closing  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.4
 AH Closing Date . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.4
 AH Disclosure Schedule  . . . . . . . . . . . . . . . . . . . . . . . . . 3
 AH Effective Time . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.6
 AH Employees  . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5(b)(i)
 AH Financial Statements . . . . . . . . . . . . . . . . . . . . . .  3.5(a)
 AH Indemnified Parties  . . . . . . . . . . . . . . . . . . . . . . 5.12(a)
 AH Membership Units . . . . . . . . . . . . . . . . . . . . . . . .  1.2(a)
 AH Merger . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  1.2(a)
 AH Merger Consideration . . . . . . . . . . . . . . . . . . . . . .  2.2(b)
 AH Merger Exchange Ratio  . . . . . . . . . . . . . . . . . . . . .  2.2(b)
 AH Organizational Documents . . . . . . . . . . . . . . . . . . . .  3.1(a)
 AH Permits  . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  3.11
 AH Policy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.12(b)
 AH Real Property Leases . . . . . . . . . . . . . . . . . . . . . . .  3.18
 Average Price . . . . . . . . . . . . . . . . . . . . . . . . . . .  2.2(b)
 Claims  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  3.14
 Claim Notice  . . . . . . . . . . . . . . . . . . . . . . . . . . .  8.2(a)
 Class A Common Stock  . . . . . . . . . . . . . . . . . . . . . . .  1.7(d)
 Class A Membership Units  . . . . . . . . . . . . . . . . . . . . .  2.2(c)
 Class B Common Stock  . . . . . . . . . . . . . . . . . . . . . . .  1.7(d)
 Code  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  Recitals
 Commodity Exchange Act  . . . . . . . . . . . . . . . . . . . . . . 3.21(h)
 Common Stock  . . . . . . . . . . . . . . . . . . . . . . . . . . .  1.7(d)
 Confidentiality Agreement . . . . . . . . . . . . . . . . . . . . . . . 5.2
 control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  9.10
 controlled by . . . . . . . . . . . . . . . . . . . . . . . . . . . .  9.10
 DGCL  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  1.1(a)
 DLLCA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  1.2(a)
 Defense Notice  . . . . . . . . . . . . . . . . . . . . . . . . . .  8.2(b)
 disqualified individual . . . . . . . . . . . . . . . . . . . . . .  3.7(f)
 Effective Time  . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.6
 Employee Benefit Plan . . . . . . . . . . . . . . . . . . . . . . 3.7(g)(i)
 Encumbrances  . . . . . . . . . . . . . . . . . . . . . . . . . . .  3.1(c)
 Environmental Claim . . . . . . . . . . . . . . . . . . . . . . . 3.6(d)(i)
 Environmental Law . . . . . . . . . . . . . . . . . . . . . . .  3.6(d)(ii)
 ERISA   . . . . . . . . . . . . . . . . . . . . . . . . . . . .  3.7(g)(ii)
 ERISA Affiliate . . . . . . . . . . . . . . . . . . . . . . . . 3.7(g)(iii)
 Escrow Agent  . . . . . . . . . . . . . . . . . . . . . . . . . . .  2.3(g)
 Escrow Indemnity Agreement  . . . . . . . . . . . . . . . . . . . .  2.3(g)
 Escrow Shares . . . . . . . . . . . . . . . . . . . . . . . . . . .  2.3(g)
 excess parachute payment  . . . . . . . . . . . . . . . . . . . . .  3.7(f)
 Exchange Act  . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.21(f)
 Exchange Agent  . . . . . . . . . . . . . . . . . . . . . . . . . .  2.3(b)
 Expiration Date . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.4
 extremely hazardous substances  . . . . . . . . . . . . . . . . 3.6(d)(iii)
 foreign person  . . . . . . . . . . . . . . . . . . . . . . . . . .  6.3(g)
 GAAP  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  Recitals
 Governmental Entity . . . . . . . . . . . . . . . . . . . . . . . .  3.8(i)
 Hazardous Materials . . . . . . . . . . . . . . . . . . . . . . 3.6(d)(iii)
 hazardous substances  . . . . . . . . . . . . . . . . . . . . . 3.6(d)(iii)
 hazardous wastes  . . . . . . . . . . . . . . . . . . . . . . . 3.6(d)(iii)
 HSR Act . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.7
 Indemnified Party . . . . . . . . . . . . . . . . . . . . . . . . .  8.2(a)
 Indemnifying Party  . . . . . . . . . . . . . . . . . . . . . . . .  8.2(a)
 Intellectual Property . . . . . . . . . . . . . . . . . . . . . 3.15(a)(ii)
 investment company  . . . . . . . . . . . . . . . . . . . . . . . . .  3.19
 Investment Company Act  . . . . . . . . . . . . . . . . . . . . . . 3.21(h)
 Investment Fund Financial Statements  . . . . . . . . . . . . . . . 3.21(d)
 Investment Funds  . . . . . . . . . . . . . . . . . . . . . . . . . 3.21(h)
 Investment Laws and Regulations . . . . . . . . . . . . . . . . . . 3.21(h)
 Investment Management Services  . . . . . . . . . . . . . . . . . . 3.21(h)
 IP Licenses . . . . . . . . . . . . . . . . . . . . . . . . . . 3.15(a)(ii)
 IRS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  3.7(b)(vi)
 KT  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  Preamble
 KT Agreements . . . . . . . . . . . . . . . . . . . . . . . . .  4.4(a)(ii)
 KT Award  . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  5.6(b)
 KT Certificate of Merger  . . . . . . . . . . . . . . . . . . . . . . . 1.5
 KT Certificates . . . . . . . . . . . . . . . . . . . . . . . . . .  2.1(b)
 KT Class A Common Stock . . . . . . . . . . . . . . . . . . . . . .  1.1(a)
 KT Closing  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3
 KT Closing Date . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3
 KT Disclosure Schedule  . . . . . . . . . . . . . . . . . . . . . . . . . 4
 KT Effective Time . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5
 KT Indemnified Parties  . . . . . . . . . . . . . . . . . . . . . . 5.12(c)
 KT Merger . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  1.1(a)
 KT Merger Consideration . . . . . . . . . . . . . . . . . . . . . .  2.1(b)
 KT Merger Exchange Ratio  . . . . . . . . . . . . . . . . . . . . .  2.1(b)
 KT Option Plans . . . . . . . . . . . . . . . . . . . . . . . . . 5.6(a)(i)
 KT Policy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.12(d)
 KT Required Statutory Approvals . . . . . . . . . . . . . . . . 4.4(a)(iii)
 KT Required Third Party Consents  . . . . . . . . . . . . . . .  4.4(a)(ii)
 KT Stock Options  . . . . . . . . . . . . . . . . . . . . . . . . 5.6(a)(i)
 KT Termination Fee  . . . . . . . . . . . . . . . . . . . . . . . .  7.3(b)
 Law . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.4(a)(iii)
 Leased Intellectual Property  . . . . . . . . . . . . . . .  3.16(a)(ii)(E)
 Losses  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.1
 Material Adverse Effect of AH . . . . . . . . . . . . . . . . . . .  3.1(a)
 Material Adverse Effect of KT . . . . . . . . . . . . . . . . . . . . . 4.1
 Members . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  Preamble
 Membership Units  . . . . . . . . . . . . . . . . . . . . . . . . .  3.2(a)
 Merger Consideration  . . . . . . . . . . . . . . . . . . . . . . .  2.2(b)
 Mergers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  1.2(a)
 Multiemployer Plan  . . . . . . . . . . . . . . . . . . . . . . . 3.7(a)(i)
 NMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  2.2(b)
 Net Assets  . . . . . . . . . . . . . . . . . . . . . . . . . . . .  3.5(b)
 New Employment Agreements . . . . . . . . . . . . . . . . . . . .  Recitals
 Non-Investment Fund Financial Statements  . . . . . . . . . . . . . 3.21(d)
 Non-Investment Funds  . . . . . . . . . . . . . . . . . . . . . . . 3.21(h)
 Owned Intellectual Property . . . . . . . . . . . . . . . .  3.15(a)(ii)(E)
 Owned Software  . . . . . . . . . . . . . . . . . . . . . .  3.15(a)(ii)(E)
 Owned Technology  . . . . . . . . . . . . . . . . . . . . .  3.15(a)(ii)(E)
 parachute payment . . . . . . . . . . . . . . . . . . . . . . . . .  3.7(f)
 pooling-of-interests  . . . . . . . . . . . . . . . . . . . . . . . 3.26(a)
 Parent  . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  Preamble
 Parent Certificates . . . . . . . . . . . . . . . . . . . . . . . .  2.1(b)
 Parent Common Stock . . . . . . . . . . . . . . . . . . . . . . . .  1.1(b)
 Parent Indemnified Parties  . . . . . . . . . . . . . . . . . . . . . . 8.1
 person  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  9.10
 Plan  . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  3.7(g)(ii)
 Preferred Stock . . . . . . . . . . . . . . . . . . . . . . . . . .  1.7(d)
 Private Fund Financial Statements . . . . . . . . . . . . . . . . . 3.21(d)
 Private Funds . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.21(h)
 Private Fund Tax Returns  . . . . . . . . . . . . . . . . . . . . . 3.21(c)
 qualified . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.7 (d)
 Regulatory Agreement  . . . . . . . . . . . . . . . . . . . . . . . .  3.23
 Regulatory Filings  . . . . . . . . . . . . . . . . . . . . . . . . 3.22(c)
 Required Statutory Approvals  . . . . . . . . . . . . . . . . . 3.4(a)(iii)
 Required Third Party Consents . . . . . . . . . . . . . . . . .  3.4(a)(ii)
 SEC Reports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.5
 Securities Act  . . . . . . . . . . . . . . . . . . . . . . . . . . 3.21(f)
 Self Regulatory Authority . . . . . . . . . . . . . . . . . . . . . .  3.23
 Significant Subsidiary  . . . . . . . . . . . . . . . . . . . . . . . . 4.1
 Software  . . . . . . . . . . . . . . . . . . . . . . . . .  3.15(a)(ii)(E)
 SubAH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  Preamble
 SubKT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  Preamble
 Subsidiaries  . . . . . . . . . . . . . . . . . . . . . . . . . . . .  9.10
 Surviving Corporation . . . . . . . . . . . . . . . . . . . . . . .  1.1(a)
 Surviving LLC . . . . . . . . . . . . . . . . . . . . . . . . . . .  1.2(a)
 Surviving Subsidiaries  . . . . . . . . . . . . . . . . . . . . . .  1.2(a)
 Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.15(i)
 Takeover Proposal . . . . . . . . . . . . . . . . . . . . . . . 5.10(a)(ii)
 Tax Returns . . . . . . . . . . . . . . . . . . . . . . . . . . . .  3.8(k)
 Taxes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  3.8(j)
 Technology  . . . . . . . . . . . . . . . . . . . . . . . .  3.15(a)(ii)(D)
 Termination Date  . . . . . . . . . . . . . . . . . . . . . . . . .  5.1(A)
 Termination Fee . . . . . . . . . . . . . . . . . . . . . . . . . .  7.3(a)
 Third Party Claim . . . . . . . . . . . . . . . . . . . . . . . . .  8.2(a)
 toxic substances  . . . . . . . . . . . . . . . . . . . . . . . 3.6(d)(iii)
 under common control with . . . . . . . . . . . . . . . . . . . . . .  9.10


                              LIST OF EXHIBITS

      Exhibit A      Form of Certificate of Incorporation of Parent
      Exhibit B      Form of Bylaws of Parent
      Exhibit C      Form of Escrow Indemnity Agreement
      Exhibit D      Form of AH Affiliate Letter



=============================================================================


                            AMENDMENT NUMBER ONE

                                   to the

                        AGREEMENT AND PLAN OF MERGER

                                   among

                             KT HOLDING COMPANY

                           KT ACQUISITION I CORP.

                          AH ACQUISITION I L.L.C.

                         KNIGHT/TRIMARK GROUP, INC.

                           ARBITRADE HOLDINGS LLC

                     TARMACHAN CAPITAL MANAGEMENT, INC.
                           TARMACHAN CAPITAL CO.
                               DEEPHAVEN INC.
                            GILDOR TRADING, INC.
                               IRVIN KESSLER

                               EFRAIM GILDOR

                                PETER HAJAS

                              MERRILL FERGUSON

                                    and

                                 MARK LYONS


                       Dated as of December 14, 1999


============================================================================


           AMENDMENT NUMBER ONE, dated as of December 14, 1999 (the
 "Amendment") to the AGREEMENT AND PLAN OF MERGER, dated as of  November 17,
 1999 (the "Agreement"), among KT HOLDING COMPANY, a Delaware corporation
 ("Parent"), KT ACQUISITION I CORP., a Delaware corporation ("SubKT"), AH
 ACQUISITION I L.L.C., a Delaware limited liability company ("SubAH"),
 KNIGHT/TRIMARK GROUP, INC., a Delaware corporation ("KT"), ARBITRADE
 HOLDINGS LLC, a Delaware limited liability company ("AH") and TARMACHAN
 CAPITAL MANAGEMENT, INC., TARMACHAN CAPITAL CO., DEEPHAVEN INC., GILDOR
 TRADING, INC., IRVIN KESSLER, EFRAIM GILDOR, PETER HAJAS, MERRILL FERGUSON
 and MARK LYONS (together, the "Members").

           WHEREAS, Parent, SubKT, SubAH, KT, AH and the Members have
 entered into the Agreement; and

           WHEREAS, the parties wish to amend the Agreement as follows.

           NOW, THEREFORE, fully intending to be legally bound hereby, the
 parties agree as follows:

                                  ARTICLE X
                                 DEFINITIONS

           Section 10.1  Definitions.

           All capitalized terms used in this Amendment that are not defined
 herein  shall have the definitions ascribed thereto in the Agreement.


                                 ARTICLE XI
                                 AMENDMENTS

           Section 11.1  Amendments to the Agreement.

           (a)  Section 1.5 of the Agreement is hereby deleted in its
 entirety and the following shall be substituted in lieu thereof:

           "Section 1.5   KT Effective Time.  Subject to the provisions
      of this Agreement, as soon as practicable on or after the KT
      Closing Date,  the parties shall file with the Secretary of State
      of the State of Delaware this Agreement and the related
      certificates of the respective secretaries of KT and SubKT as
      required by Section 251(g) of the DGCL, executed in accordance
      with the relevant provisions of the DGCL, and shall make all
      other filings or recordings required under the DGCL in order to
      effect the KT Merger.  The KT Merger shall become effective at
      such time as this Agreement is so filed with the Secretary of
      State of the State of Delaware (the time at which the KT Merger
      has become fully effective being hereinafter referred to as the
      "KT Effective Time")."

           (b)  Section 1.7(d) of the Agreement is hereby deleted in its
 entirety and the following shall be substituted in lieu thereof:

             "(d)   Charter Documents.  (i) At the KT Effective Time,
      the Certificate of Incorporation and the Bylaws of KT, as in
      effect immediately prior to the KT Effective Time, shall be the
      Certificate of Incorporation and Bylaws, respectively, of the
      Surviving Corporation; provided, however, that, with respect to
      the Certificate of Incorporation, from and after the KT Effective
      Time, (x) Article FIRST shall be amended and restated in its
      entirety as follows "FIRST: The name of the Corporation is
      Knight/Trimark, Inc. (the "Corporation")"; (y) paragraph (a) of
      Article FOURTH shall be amended and restated and shall be read in
      its entirety as follows:  "FOURTH:  The total number of shares of
      stock which the Corporation shall have authority to issue is
      3,000 shares of capital stock, consisting of (i) 1,000 shares of
      class A common stock, par value $.01 per share (the "Class A
      Common Stock"), (ii) 1,000 shares of class B common stock, par
      value $.01 per share (the "Class B Common Stock" and, together
      with the Class A Common Stock, the "Common Stock"), and (iii)
      1,000 shares of preferred stock, par value $.01 per share (the
      "Preferred Stock")"; and (z) a new Article TWELFTH shall be added
      thereto which shall be and read in its entirety as follows:
      "TWELFTH:  Any act or transaction by or involving this
      Corporation that requires for its adoption under the GCL or this
      Amended and Restated Certificate of Incorporation the approval of
      the stockholders of this Corporation (other than the election or
      removal of directors of this Corporation) shall, pursuant to
      Section 251(g) of the GCL, require, in addition, the approval of
      the stockholders of Knight/Trimark Group, Inc., a Delaware
      corporation, or any successor thereto by merger, by the same vote
      that is required by the GCL and/or the Amended and Restated
      Certificate of Incorporation of this Corporation"; and (ii) at
      the AH Effective Time, the Certificate of Formation and the
      Agreement of Limited Liability Company of SubAH, as in effect
      immediately prior to the AH Effective Time, shall be the
      Certificate of Formation and Agreement of Limited Liability
      Company, respectively, of the Surviving LLC."

           (c)  Section 1.9 of the Agreement is hereby deleted in its
 entirety and the following shall be substituted in lieu thereof:

             "Section 1.9   Parent Charter Documents and Name.  At the
      KT Effective Time, the provisions of the Certificate of
      Incorporation and Bylaws of Parent shall be as set forth
      substantially in the form of Exhibit A and Exhibit B hereto,
      respectively, with such changes as are necessary so that the name
      of Parent as of the KT Effective Time shall be changed to
      "Knight/Trimark Group, Inc."

           (d)  The following entry in the "Index of Defined Terms" set
 forth in the Agreement is hereby deleted in its entirety:

      "KT Certificate of Merger..................................... 1.5"


                                 ARTICLE XII
                                MISCELLANEOUS

           Section 12.1  Counterparts; Effectiveness.  This Amendment may be
 executed in two or more consecutive counterparts, each of which shall be an
 original, with the same effect as if the signatures thereto and hereto were
 upon the same instrument, and shall become effective when one or more
 counterparts have been signed by each of the parties and delivered (by
 telecopy or otherwise) to the other parties.

           Section 12.2  Governing Law.  THIS AMENDMENT SHALL BE DEEMED TO
 BE MADE IN AND IN ALL RESPECTS SHALL BE INTERPRETED, CONSTRUED AND GOVERNED
 BY AND IN ACCORDANCE WITH THE LAW OF THE STATE OF DELAWARE WITHOUT REGARD
 TO THE CONFLICT OF LAW PRINCIPLES.

           Section 12.3  Continuing Effect. Except to the extent amended
 hereby, the provisions of the Agreement shall remain unmodified and
 effective as of their respective dates, and the Agreement, as amended by
 this Amendment, hereby is confirmed as being in full force and effect in
 accordance with its terms.  This Amendment is limited as specified and
 shall not constitute a modification, acceptance or waiver of any other
 provision of the Agreement.  From and after the date hereof, except as the
 context otherwise requires, all references in the Agreement to the
 "Agreement" shall be deemed to be references to the Agreement as amended
 hereby.

           IN WITNESS WHEREOF, the parties hereto have caused this Amendment
 to be duly executed and delivered as of the date first above written.


                     KT HOLDING COMPANY


                     By:  /s/ Kenneth D. Pasternak
                          ------------------------------------------------
                          Name:  Kenneth D. Pasternak
                          Title: Chief Executive Officer and President


                     KT ACQUISITION I CORP.


                     By:  /s/ Kenneth D. Pasternak
                          ------------------------------------------------
                          Name: Kenneth D. Pasternak
                          Title:    Chief Executive Officer and President


                     AH ACQUISITION I L.L.C.


                     By:  /s/ Kenneth D. Pasternak
                          ------------------------------------------------
                          Name: Kenneth D. Pasternak
                          Title:  Chief Executive Officer and President


                     KNIGHT/TRIMARK GROUP, INC.


                     By:  /s/ Kenneth D. Pasternak
                          ------------------------------------------------
                          Name: Kenneth D. Pasternak
                          Title: Chief Executive Officer and President


                     ARBITRADE HOLDINGS LLC


                     By:  /s/ Irvin Kessler
                          ------------------------------------------------
                          Name: Irvin Kessler
                          Title: Managing Director


                          /s/ Peter Hajas
                          ------------------------------------------------
                          PETER HAJAS


                          /s/ Merrill Ferguson
                          ------------------------------------------------
                          MERRILL FERGUSON


                          /s/ Mark Lyons
                          ------------------------------------------------
                          MARK LYONS


                          /s/ Irvin Kessler
                          ------------------------------------------------
                          TARMACHAN CAPITAL MANAGEMENT, INC.


                          /s/ Irvin Kessler
                          ------------------------------------------------
                          TARMACHAN CAPITAL CO.


                          /s/ Irvin Kessler
                          ------------------------------------------------
                          DEEPHAVEN INC.


                          /s/ Efraim Gildor
                          ------------------------------------------------
                          GILDOR TRADING, INC.

 Other than for
 purposes of Articles I,
 II (except Section
 2.3(g)) and IV of the
 Agreement as amended
 by this Amendment        /s/ Irwin Kessler
                          ------------------------------------------------
                          IRVIN KESSLER

 Other than for purpose
 of Article I, II
 (except Section 2.3(g))
 and IV of the Agreement
 as amended by this
 Agreement                /s/ Efraim Gildor
                          ------------------------------------------------
                          EFRAIM GILDOR