Guggenheim Funds Distributors, LLC
                              227 W. Monroe Street
                            Chicago, Illinois 60606


                               February 13, 2020


Securities and Exchange Commission
100 F Street, N.E.
Washington, DC 20549


                 Re: Guggenheim Defined Portfolios, Series 1986
                        File Nos. 333-235843 & 811-03763

Ladies/Gentlemen:

     The undersigned, Guggenheim Defined Portfolios, Series 1986 (the "Trust"),
by Guggenheim Funds Distributors, LLC, as the sponsor and depositor of the Trust
and of the units covered by the subject Registration Statement, pursuant to the
provisions of Rule 461 of the General Rules and Regulations of the Securities
and Exchange Commission (the "Commission") under the Securities Act of 1933,
hereby respectfully requests that the Commission consent to the filing of the
amendment to the Registration Statement and grant acceleration of the
effectiveness of said Registration Statement, as amended, so that the same may
become effective by 1 p.m. Eastern time on February 19, 2020, or as soon
thereafter as possible.

                                                               Very truly yours,

                                      Guggenheim Defined Portfolios, Series 1986

                                          By: Guggenheim Funds Distributors, LLC


                                                                 By: /s/ Amy Lee
                                                                 ---------------
                                                                         Amy Lee
                                                    Vice President and Secretary