UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                    FORM 8-K

                                 CURRENT REPORT

     Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report: April 27, 2006
(Date of earliest event reported)

                  Banc of America Alternative Loan Trust 2006-4
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           (Exact name of issuing entity as specified in its charter)

                    Banc of America Mortgage Securities, Inc.
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              (Exact name of depositor as specified in its charter)

                      Bank of America, National Association
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               (Exact name of sponsor as specified in its charter)

         New York                   333-132249-03             Applied For
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(State or other                   (Commission File No.       (IRS Employer
jurisdiction of                    of issuing entity)        Identification No.)
incorporation of                                             of issuing entity)
issuing entity)

    214 North Tryon Street, Charlotte, North Carolina                28255
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Address of principal executive offices                              (Zip Code)

Depositor's telephone number, including area code          (704) 387-8239
                                                   -----------------------------

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          (Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to
simultaneously satisfy the filing obligation of the registrant under any of the
following provisions:

| | Written communications pursuant to Rule 425 under the Securities Act (17 CFR
230.425)

| | Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR
240.14a-12)

| | Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange
Act (17 CFR 240.14d-2(b))

| | Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange
Act (17 CFR 240.13e-4(c))



ITEM 9.01           Financial Statements and Exhibits

                    (c)     Exhibits

Item 601(a)
of Regulation S-K
Exhibit No.                                          Description
- -----------                                          -----------
         (5)                  Legality Opinion of Cadwalader, Wickersham &
                              Taft LLP.
         (8)                  Tax Opinion of Cadwalader, Wickersham & Taft LLP
                              (included as part of Exhibit 5).
         (23)                 Consent of Cadwalader, Wickersham & Taft
                              LLP (included as part of Exhibit 5).



      Pursuant to the requirements of the Securities Exchange Act of 1934, the
registrant has duly caused this report to be signed on its behalf by the
undersigned hereunto duly authorized.

                                         BANC OF AMERICA MORTGAGE
                                           SECURITIES, INC.

April 27, 2006

                                          By:     /s/ Judy Lowman
                                                --------------------------------
                                                Name:  Judy Lowman
                                                Title: Senior Vice President



                                INDEX TO EXHIBITS

Exhibit No.                                          Description
- -----------                                          -----------
         (5)                  Legality Opinion of Cadwalader, Wickersham &
                              Taft LLP.
         (8)                  Tax Opinion of Cadwalader, Wickersham & Taft LLP
                              (included as part of Exhibit 5).
         (23)                 Consent of Cadwalader, Wickersham & Taft
                              LLP (included as part of Exhibit 5).