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 (Date of earliest event reported): September 116, 2009

CAST Step-Up Trust for Morgan Stanley Notes

(Exact name of registrant as specified in its charter)

Structured Products Corp.

on behalf of

Cast Step-Up Trust for Morgan Stanley Notes

(Exact name of registrant as specified in its charter)

Delaware	001-31757	13-3692801
(State or other jurisdiction of incorporation or organization)	(Commission File Number)	(IRS Employer Identification Number)

388 Greenwich Street New York, New York	10013	(212) 816-7496
(Address of principal executive offices)	(Zip Code)	(Registrant's telephone number including area code)

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:

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

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

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

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

Section 8 - Other Events

Item 8.01 Other Events.

This current report on Form 8-K relates to a distribution made to holders of the Certificates issued by the ~~Cast~~CAST Step-Up Trust for Morgan Stanley Notes, CAST Supplement 2003-6 (the "Trust").

~~The~~Pursuant ~~issuer of the underlying securities, or guarantor thereof, or successor thereto, as applicable, is subject~~ to the ~~information reporting~~ requirements of the Securities Exchange Act of 1934, ~~as amended (~~the ~~"Exchange~~registrant ~~Act").~~has ~~Periodic~~duly ~~reports~~caused ~~and~~this ~~other~~report ~~information required~~ to be ~~filed~~signed ~~pursuant~~on toits ~~the~~behalf ~~Exchange Act,~~ by the ~~issuer~~undersigned ofhereunto ~~the~~duly underlying securities, or guarantor thereof, or successor thereto, as applicable, may be inspected and copied at the public reference facilities maintained by the Securities and Exchange Commission (the "Commission") at 450 Fifth Street, Nauthorized.W., Washington, D.C. 20549. The Commission also 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. Neither Structured Products Corp. 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 Structured Products Corp. 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 guarantor thereof, or successor thereto, as applicable, or the underlying securities have not occurred or have not yet been publicly disclosed which would affect the accuracy or completeness of the publicly available documents described above.

Underlying Securities Issuer(s) or Guarantor, or successor thereto	Exchange Act File Number
Morgan Stanley	001-11758

Section 9- Financial Statements and Exhibits

Section 9 - Financial Statements and Exhibits

Item 9.01 Financial Statements and Exhibits.

(c)

Exhibits:

1. Trustee's Report with respect to the September 116, 2009 Distribution Date for ~~the~~theCAST ~~CAST~~ Step-Up Trust for Morgan Stanley Notes, CAST Supplement 2003-6 (the "Trust").

SIGNATURES

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.

By: /s/ Stanley Louie ~~________________________________~~

________________________________

Name: Stanley Louie

Title: ~~Authorized~~Vice ~~Signatory~~President, Finance Officer

September 116, 2009

EXHIBIT INDEX

Exhibit		Page
1	Trustee's Report with respect to the September 116, 2009 Distribution Date for the ~~Cast~~CAST Step-Up Trust for Morgan Stanley Notes, CAST Supplement 2003-6 (the "Trust").	5

Exhibit

To the Holders of: CAST Step-Up Trust for Morgan Stanley Notes, CAST Supplement 2003-6 (the "Trust"). Monthly-Pay Step-Up Class A Certificates *CUSIP: ~~14835T~~14835TAB4 ~~AB4~~ Class B Certificates *CUSIP: ~~14835T AA6~~14835TAA6

U.S. Bank Trust National Association, as Trustee for the CAST Step-Up Trust for Morgan Stanley Notes, CAST Supplement 2003-6 (the "Trust"), hereby gives notice with respect to the Final Distribution Date of September 116, 2009 (the "Distribution Date") as follows:

1. The amount of the distribution payable to the Certificateholders on the Distribution Date allocable to ~~principal~~purchase ~~and~~price, principal, premium, if any, and interest, expressed as a dollar amount per $1,000 Class A Certificate and per $1,000 Notional Amount of Class B Certificates, is as set forth below:

Class	Principal	Purchase Price	Interest	Total Distribution	~~Total Distribution~~
A	$ 1,000.000000	$ 0.000000	$ 2.187500	4$ 1,002.~~375000~~187500	$	~~4.375000~~
B	$ 0.000000	0$ 1.~~000000~~562893	$ 0.020833	0$ 1.~~250000~~583726	$	~~0.250000~~

2.	The amount of aggregate interest due and not paid as of the Distribution Date is $0.000000.

3. The Class A Certificates ~~bear~~accrued interest at the rate of 5.25% and the Class B Certificates ~~bear~~accrued interest at a rate of 0.05% during the period ending on the Distribution Date.

4.	No fees have been paid to the Trustee or any other party from the proceeds of the Term Assets.

5. ~~$15,000,000~~All ~~aggregate principal amount~~ of ~~Morgan~~the ~~Stanley~~Term ~~f/k/a~~Assets ~~Morgan~~were ~~Stanley~~purchased ~~Dean~~by ~~Witter & Co. 5.30% Notes due March 1, 2013 (~~the ~~"Term~~Call ~~Assets")~~Warrant ~~are~~Holder ~~held~~on ~~for~~ the ~~above~~Distribution ~~trust~~Date.

6. At the close of business on the Distribution Date, ~~15,000~~0 Class A Certificates representing $~~15,000,000~~0 aggregate Certificate Principal Balance and $~~15,000,000~~0 aggregate Notional Amount of Class B Certificates were outstanding and the CAST Step-Up Trust for Morgan Stanley Notes terminated.

7. The ~~Notional Amount of the~~ ISDA Master Agreement , the Schedule thereto and the Confirmation thereto each dated July 25, 2003 between the Trust and Citigroup Global Markets Limited (collectively the "Swap"), iswere ~~$15,000,000.~~terminated ~~Payment~~effective ofSeptember ~~the obligations of Citigroup Global Markets Limited under the Swap is guaranteed by Citigroup Global Markets Holdings Inc. under a Guarantee Agreement dated July 25~~16, ~~2003~~2009.

8. The current rating of the Term Assets is not provided in this report. Ratings can be obtained from Standard & Poor's Ratings Services, a division of The McGraw-Hill Companies, Inc., by calling 212-438-2400 and from Moody's Investors Service, Inc. by calling 212-553-0377.

U.S. Bank Trust National Association, as Trustee

* The Trustee shall not be held responsible for the selection or use of the CUSIP number nor is any representation made as to its correctness. It is included for the convenience of the Holders.

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