UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549
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FORM 10-K
FOR ANNUAL AND TRANSITION REPORTS
PURSUANT TO SECTIONS 13 OR 15(d) OF THE
SECURITIES EXCHANGE ACT OF 1934

(Mark One)

ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
EXCHANGE ACT OF 1934

For the fiscal year ended December 31, 2005

TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
EXCHANGE ACT OF 1934

For the transition period from ________ to ________

Commission File Numbers: 333-111858-01, 001-32156

Synthetic Fixed-Income Securities, Inc.

on behalf of:

STRATS(SM) Trust For United States Cellular Corporation Securities,
Series 2004-6
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(Exact name of registrant as specified in its charter)

Delaware 52-2316339
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(State or other jurisdiction of incorporation (I.R.S. Employer Identification No.)
or organization)

301 South College, Charlotte, North Carolina 28288
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(Address of principal executive offices) (Zip Code)

Registrant's telephone number, including area code: (704) 383-7727

Securities registered pursuant to Section 12(b) of the Act:

Title of each class Name of exchange on which registered
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STRATS(SM) Certificates, Series 2004-6, Class A-1 New York Stock Exchange ("NYSE")

Securities registered pursuant to Section 12(g) of the Act: None

Indicate by check mark if the registrant is a well-known seasoned issuer, as
defined in Rule 405 of the Securities Act.
Yes No X

Indicate by check mark if the registrant is not required to file reports
pursuant to Section 13 or Section 15(d) of the Act.
Yes No X

Indicate by check mark whether the registrant: (1) Has filed all reports
required to be filed by section 13 or 15(d) of the Securities Exchange Act of
1934 during the preceding 12 months (or for such shorter period that the
registrant was required to file such reports), and (2) has been subject to
such filing requirements for the past 90 days.
Yes X No

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405
of Regulation S-K is not contained herein, and will not be contained, to the
best of registrant's knowledge, in definitive proxy or information statements
incorporated by reference in Part III of this Form 10-K or any amendment to
this Form 10-K.
Not applicable.

Indicate by check mark whether the registrant is large accelerated filer, an
accelerated filer or a non-accelerated filer. See the definition of
"accelerated filer and large accelerated filer" in Rule 12b-2 of the Exchange
Act. (check one):

Large accelerated filer Accelerated filer Non-accelerated filer X

Indicate by check mark whether the registrant is a shell company (as defined
in Rule 12b-2 of the Act).
Yes No X

State the aggregate market value of the voting and non-voting common equity
held by non-affiliates computed by reference to the price at which the common
equity was last sold, or the average bid and asked price of such common
equity, as of the last business day of the registrant's most recently
completed second fiscal quarter:

The registrant has no voting stock or class of common stock that is held by
non-affiliates.

DOCUMENTS INCORPORATED BY REFERENCE

The following documents are incorporated by reference into Part IV of this
Annual Report: the distribution reports to security holders filed on Form 8 K
during the fiscal year, in lieu of reports on Form 10 Q, which include the
reports filed on Form 8 K listed in Item 15(a) hereto.

Introductory Note

Synthetic Fixed-Income Securities, Inc. (the "Depositor") is the Depositor in
respect of the STRATS(SM) Trust For United States Cellular Corporation
Securities, Series 2004-6 (the "Trust"), a common law trust formed pursuant to
the Base Trust Agreement, dated as of September 26, 2003, between the
Depositor and U.S. Bank Trust National Association, as trustee (the
"Trustee"), as supplemented by the STRATS(SM) Certificates Series Supplement
2004-6 (the "Series Supplement") dated as of April 21, 2004 in respect of the
Trust. The Trust's assets consist solely of notes issued by United States
Cellular Corporation. The Certificates do not represent obligations of or
interests in the Depositor or the Trustee.

Pursuant to staff administrative positions established in Corporate Asset
Backed Corporation (available August 9, 1995), the Trust is not required to
respond to various items of Form 10-K. Such items are designated herein as
"Not Applicable." Distribution reports detailing receipts and distributions by
the Trust are filed after each distribution date on Form 8-K in lieu of
reports on Form 10-Q.

United States Cellular Corporation, the issuer of the underlying securities,
is subject to the information reporting requirements of the Securities
Exchange Act of 1934, as amended, (the "Exchange Act"). For information on
United States Cellular Corporation please see its periodic and current reports
filed with the Securities and Exchange Commission (the "Commission") under its
Exchange Act file number, 001-09712. The Commission maintains a site on the
World Wide Web at "http://www.sec.gov" at which users can view and download
copies of reports, proxy and information statements and other information
filed electronically through the Electronic Data Gathering, Analysis and
Retrieval system, or "EDGAR." Periodic and current reports and other
information required to be filed pursuant to the Exchange Act, by United
States Cellular Corporation may be accessed on this site. Neither Synthetic
Fixed-Income Securities, Inc. nor the Trustee has participated in the
preparation of such reporting documents, or made any due diligence
investigation with respect to the information provided therein. Neither
Synthetic Fixed-Income Securities, Inc. nor the Trustee has verified the
accuracy or completeness of such documents or reports. There can be no
assurance that events affecting the issuer of the underlying securities, or
the underlying securities themselves, have not occurred or have not yet been
publicly disclosed which would affect the accuracy or completeness of the
publicly available documents described above.

PART I

Item 1. Business.
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Not Applicable

Item 1A. Risk Factors.
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Not Applicable

Item 1B. Unresolved Staff Comments.
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Not Applicable

Item 2. Properties.
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Not Applicable

Item 3. Legal Proceedings.
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None

Item 4. Submission of Matters to a Vote of Security Holders.
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None

PART II

Item 5. Market for Registrant's Common Equity, Related Stockholder Matters and
Issuer Purchases of Equity Securities.
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The Class A-1 Certificates representing investors' interest in the
Trust are represented by one or more physical Certificates registered in the
name of "Cede & Co.", the nominee of The Depository Trust Company. The Class
A-1 Certificates are listed on the NYSE.

Item 6. Selected Financial Data.
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Not Applicable
3

Item 7. Management's Discussion and Analysis of Financial Condition and
Results of Operations.
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Not Applicable

Item 7A. Quantitative and Qualitative Disclosures About Market Risk.
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Not Applicable

Item 8. Financial Statements and Supplementary Data.
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Not Applicable

Item 9. Changes in and Disagreements With Accountants on Accounting and
Financial Disclosure.
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None

Item 9A. Controls and Procedures.
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Not Applicable

Item 9B. Other Information.
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None

PART III

Item 10. Directors and Executive Officers of the Registrant.
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Not Applicable

Item 11. Executive Compensation.
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Not Applicable

Item 12. Security Ownership of Certain Beneficial Owners and Management and
Related Stock Matters.
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Not Applicable

Item 13. Certain Relationships and Related Transactions.
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None

Item 14. Principal Accounting Fees and Services.
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Not Applicable

PART IV

Item 15. Exhibits, Financial Statement Schedules.
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(a) The following documents have been filed as part of this report.

1. Trustee's Distribution Statements documented on Form 8-K
of STRATS(SM) Trust For United States Cellular Corporation
Securities, Series 2004-6 to the certificateholders for
the period from January 1, 2005 through and including
December 31, 2005 have been filed with the Securities and
Exchange Commission and are hereby incorporated by
reference. Filing dates are listed below:

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Trust Description Distribution Date Filed on
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STRATS(SM) Trust For United States Cellular Corporation Securities, 06-15-2005 07-21-2005
Series 2004-6 12-15-2005 12-21-2005
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2. None

3. Exhibits:

31.1 - Certification by Director of the Registrant
pursuant to 15 U.S.C. Section 7241, as adopted
pursuant to Section 302 of the Sarbanes-Oxley Act
of 2002.

99.1 - Annual Compliance Report by Trustee pursuant
to 15 U.S.C. Section 7241, as adopted pursuant to
Section 302 of the Sarbanes-Oxley Act of 2002.

99.2 - Report of Aston Bell, CPA.

99.3 - Registrant's Current Report on Form 8-K
filed with the Securities and Exchange Commission
on July 21, 2005, as further described in Item
15(a)(1) above, is incorporated herein by
reference.

99.4 - Registrant's Current Report on Form 8-K
filed with the Securities and Exchange Commission
on December 21, 2005, as further described in Item
15(a)(1) above, is incorporated herein by
reference.

(b) See Item 15(a) above.

SIGNATURE

Pursuant to the requirements of Section 13 or 15(d) of the Securities
Exchange Act of 1934, the registrant has duly caused this report to be signed
on its behalf by the undersigned thereunto duly authorized.

Synthetic Fixed-Income Securities, Inc.,
as Depositor for the Trust

By: /s/ Jimmy Whang
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Name: Jimmy Whang
Title: Director

Dated: March 30, 2006

EXHIBIT INDEX

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Reference Number Description of Exhibits Exhibit Number
per Item 601 of in this
Regulation SK Form 10-K
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(31.1) Certification by Director of the Registrant 31.1
pursuant to 15 U.S.C. Section 7241, as adopted
pursuant to Section 302 of the Sarbanes-Oxley Act
of 2002.
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Annual Compliance Report by Trustee pursuant to 15
(99.1) U.S.C. Section 7241, as adopted pursuant to 99.1
Section 302 of the Sarbanes-Oxley Act of 2002.
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(99.2) Report of Aston Bell, CPA. 99.2
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Registrant's Current Report on Form 8-K filed with the
Securities and Exchange Commission on July 21,
(99.3) 2005, as further described in Item 15(a)(1) above, is 99.3
incorporated herein by reference.
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Registrant's Current Report on Form 8-K filed with
the Securities and Exchange Commission on December
(99.4) 21, 2005, as further described in Item 15(a)(1) 99.4
above, is incorporated herein by reference.
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