UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

____

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, 2009

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: 333-70808-01, 001-32031

Synthetic Fixed-Income Securities, Inc.

on behalf of:

STRATSSM Trust For Boeing Securities, Series 2004-1

______________________________________________________

(Exact name of registrant as specified in its charter)

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


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

Registrant’s telephone number, including area code: (212) 214-6282

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

Title of each class	Name of Registered exchange on which registered

STRATSSM Certificates, Series 2004-1, 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 o 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 o 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 o

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).

Yes x No o

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 o Accelerated filer o 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 o 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 STRATSSM Trust For Boeing Securities, Series 2004-1 (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 STRATSSM Certificates Series Supplement 2004-1 (the “Series Supplement”) dated as of January 23, 2004 in respect of the Trust. The Trust’s assets consist solely of debentures issued by The Boeing Company. 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.

The Boeing Company, 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 The Boeing Company please see its periodic and current reports filed with the Securities and Exchange Commission (the “Commission”) under its Exchange Act file number, 001-00442. 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 The Boeing Company 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.

Not Applicable

Item 1A. Risk Factors.

Not Applicable

Item 1B. Unresolved Staff Comments.

Not Applicable

Item 2. Properties.

Not Applicable

Item 3. Legal Proceedings.

None

Item 4. Submission of Matters to a Vote of Security Holders.

None

PART II

Item 5. Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities.

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.

Not Applicable

Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations.

Not Applicable

Item 7A. Quantitative and Qualitative Disclosures About Market Risk.

Not Applicable

Item 8. Financial Statements and Supplementary Data.

Not Applicable

Item 9. Changes in and Disagreements With Accountants on Accounting and Financial Disclosure.

None

Item 9A. Controls and Procedures.

Not Applicable

Item 9B. Other Information.

None

PART III

Item 10. Directors and Executive Officers of the Registrant.

Not Applicable

Item 11. Executive Compensation.

Not Applicable

Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stock Matters.

Not Applicable

Item 13. Certain Relationships and Related Transactions.

None

Item 14. Principal Accounting Fees and Services.

Not Applicable

PART IV

Item 15. Exhibits, Financial Statement Schedules.

(a) The following documents have been filed as part of this report.

Trustee’s Distribution Statements documented on Form 8-K of STRATSSM Trust For Boeing Securities, Series 2004-1 to the certificateholders for the period from January 1, 2009 through and including December 31, 2009 have been filed with the Securities and Exchange Commission and are hereby incorporated by reference. Filing dates are listed below:

Trust Description	Distribution Date	Filed on
STRATSSM Trust For Boeing Securities, Series 2004-1	02-17-2009 08-17-2009	02-26-2009 08-31-2009

None

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 February 26, 2009, 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 August 31, 2009, 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/ William Threadgill
	Name:	William Threadgill
	Title:	President

Dated: March 30, 2010

EXHIBIT INDEX

Reference Number per Item 601 of Regulation SK	Description of Exhibits	Exhibit Number in this Form 10-K
(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.	31.1
(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.	99.1
(99.2)	Report of Aston Bell, CPA.	99.2
(99.3)	Registrant’s Current Report on Form 8-K filed with the Securities and Exchange Commission on February 26, 2009, as further described in Item 15(a)(1) above, is incorporated herein by reference.	99.3
(99.4)	Registrant’s Current Report on Form 8-K filed with the Securities and Exchange Commission on August 31, 2009, as further described in Item 15(a)(1) above, is incorporated herein by reference.	99.4

STRATS SM TRUST FOR BOEING SEC SER 2004 1 10-K