Chapman and Cutler LLP
111 West Monroe Street
Chicago, Illinois 60603
October 1, 2019
Mr. Edward Bartz
Division of Investment Management
Securities and Exchange Commission
100 F Street, N.E.
Washington, DC 20549
Re: Guggenheim Defined Portfolios, Series 1943
Convertible & Income Portfolio of Funds, Series 31
File Nos. 333-233486 and 811-03763
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Dear Mr. Bartz:
This letter responds to your comment given during a telephone conversation
with our office regarding the registration statement on Form S-6 for Guggenheim
Defined Portfolios, Series 1943, filed on August 28, 2019 with the Securities
and Exchange Commission (the "Commission"). The registration statement proposes
to offer the Convertible & Income Portfolio of Funds, Series 3 (the "Trust").
PROSPECTUS
Investment Summary -- Principal Risks
1. The duration example in the sixth bullet under the "Principal Risks"
section uses a duration of five years. Please confirm that the average weighted
duration of the underlying securities is approximately five years or less. If
not, please revise this example to reflect the average weighted duration of the
underlying securities.
Response: The sponsor confirms that the average weighted duration of the
underlying securities is approximately five years or less and, therefore, the
example does not need to be revised.
We appreciate your prompt attention to this registration statement. If you
have any questions or comments or would like to discuss our responses to your
questions, please feel free to contact the undersigned at (312) 845-3484.
Very truly yours,
CHAPMAN AND CUTLER LLP
By /s/ Morrison C. Warren
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Morrison C. Warren