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: October 29, 2001
                       ----------------------------------
                        (Date of earliest event reported)


                       CITICORP MORTGAGE SECURITIES, INC.
                             (Packager and Servicer)
   (Issuer in Respect of the REMIC Pass-Through Certificates, Series 2001-15)
   --------------------------------------------------------------------------
               (Exact name of registrant as specified in charter)


   Delaware                     333-72459                     13-3408713
 ----------------------------------------------------------------------------
  (State or other juris-       (Commission                 (I.R.S. Employer
 diction of organization)       File Nos.)                Identification No.)


12855 North Outer Forty Drive, St. Louis, Missouri            63141
--------------------------------------------------          ----------
   (Address of principal executive offices)                 (Zip Code)


Registrant's Telephone Number, including area code: (314) 851-6305

--------------------------------------------------------------------------
(Former name, former address and former fiscal year, if changed since last
report.)





Item 2.   Acquisition or Disposition of Assets.


                       CITICORP MORTGAGE SECURITIES, INC.
                 REMIC Pass-Through Certificates, Series 2001-15
                 -----------------------------------------------

                                October 29, 2001

                    DETAILED DESCRIPTION OF THE MORTGAGE POOL
                    -----------------------------------------
                         AND THE MORTGAGED PROPERTIES(1)
                         -------------------------------

      On October 29, 2001, Citicorp Mortgage Securities, Inc. ("CMSI")
transferred to the Trustee Mortgage Loans evidenced by Mortgage Notes with an
aggregate Adjusted Balance outstanding (after deducting principal payments due
on or before October 1, 2001) as of October 1, 2001 of $250,003,265.96. The
Mortgage Loans were delivered in exchange for the Certificates, authenticated by
the Trustee, evidencing 100% of the regular interests in the Trust.
Distributions on the Certificates will be made by The Bank of New York, as
paying agent, by wire transfer or by such other means as the person entitled
thereto and CMSI shall agree. CMSI may repurchase all Mortgage Loans remaining
in the Mortgage Pool pursuant to the Pooling Agreement if at the time of
repurchase the aggregate Adjusted Balance of such Mortgage Loans is less than
$12,500,163.30. Information below is provided with respect to all Mortgage Loans
included in the Mortgage Pool.

      The total number of Mortgage Loans as of October 1, 2001 was 592. The
weighted average interest rate on the Mortgage Loans (before deduction of the
servicing fee) (the "Note Rate of the Mortgage Loans") as of October 1, 2001 was
7.325%. The weighted average remaining term to stated maturity of the Mortgage
Loans as of October 1, 2001 was 356.92 months. All Mortgage Loans have original
maturities of at least 20 but no more than 30 years. None of the Mortgage Loans
were originated prior to July 1, 2000 or after October 1, 2001. The weighted
average original term to stated maturity of the Mortgage Loans as of October 1,
2001 was 358.51 months.

      None of the Mortgage Loans has a scheduled maturity later than October 1,
2031. Each Mortgage Loan had an original principal balance of not less than
$147,000 nor more than $1,000,000. Mortgage Loans having an aggregate Adjusted
Balance of $4,255,518 as of October 1, 2001 had loan-to-value ratios at
origination in excess of 80%, but no Mortgage Loans had loan-to-value ratios in
excess of 95%. The weighted average loan-to-value ratio at origination of the
Mortgage Loans as of October 1, 2001 was 69.7%. No more than $2,427,221 of the
Mortgage Loans are secured by Mortgaged Properties located in any one zip code.
At least 99%(2) of the Mortgage Loans are secured by Mortgaged Properties
determined by CitiMortgage, Inc. to be the primary residence of the borrower
("homeowner"). The sole basis for such determination is either (a) a
representation by the homeowner at origination of the Mortgage Loan that the

--------

1     Capitalized terms used herein and not otherwise defined have the meaning
      assigned thereto in the Prospectus dated October [  ], 2001 (consisting
      of a Prospectus Supplement dated October [  ], 2001 and a Core Prospectus
      dated May 24, 2001), relating to the REMIC Pass-Through Certificates,
      Series 2001-15.

2     Such Percentages are expressed as a percentage of the aggregate Adjusted
      Balance of the Mortgage Loans having such characteristics relative to the
      Adjusted Balance of all Mortgage Loans.





underlying property will be used for a period of at least 6 months every year or
that he intends to use the underlying property as his or her primary residence,
or (b) that the address of the underlying property is the homeowner's mailing
address as reflected in Originator's records. No more than 1% of the Mortgage
Loans are secured by investment properties.

      At least 97% of the Mortgage Loans will be Mortgage Loans originated using
loan underwriting policies which require, among other things, proof of income
and liquid assets and telephone verification of employment, or are refinanced
Mortgage Loans originated using alternative or streamlined underwriting
policies. No more than 3% of the Mortgage Loans will be Mortgage Loans
originated using a loan underwriting policy, which among other things, requires
verification of employment and may require proof of liquid assets, but does not
require verification of income as stated on the loan application. No more than
50% of the Mortgage Loans will be refinanced Mortgage Loans originated using
alternative or streamlined underwriting policies. See "Mortgage loan
underwriting" in the Prospectus.

      All of the Mortgage Loans which had loan-to-value ratios greater than 80%
at origination had primary mortgage insurance as of such date. In the case of
the Mortgage Loans for which Additional Collateral (as defined in the Pooling
Agreement) was pledged, taken as a group:

      (1) the number of such loans is 2;

      (2) such loans have an aggregate Adjusted Balance of $620,221;

      (3) the weighted average loan-to-value ratio of such loans, taking into
      account the loanable value of the additional pledged collateral, is
      78.4% and

      (4) the weighted average loan-to-value ratio of such loans, without
      taking into account the loanable value of the additional pledged
      collateral, is 98.4%.

      Discount Mortgage Loans will consist of Mortgage Loans with Net Note Rates
("NNRs") less than 6.500%. Premium Mortgage Loans will consist of Mortgage Loans
with NNRs greater than or equal to 6.500%. The aggregate Adjusted Balances
outstanding as of the Cut-off Date of the Discount Mortgage Loans and the
Premium Mortgage Loans were $446,606 and $249,556,660, respectively. The
weighted average Note Rates of the Discount Mortgage Loans and the Premium
Mortgage Loans, as of the Cut-off Date, were 6.625% and 7.327%, respectively.
The weighted average remaining terms to stated maturity of the Discount Mortgage
Loans and the Premium Mortgage Loans, as of the Cut-off Date, were 359.00 months
and 356.92 months, respectively.





      The Special Hazard Loss Amount as of October 1, 2001 was $2,500,032.66.

      The Fraud Loss Amount as of October 1, 2001 was $2,500,032.66.

      The Bankruptcy Loss Amount as of October 1, 2001 was $100,000.00.

      The aggregate Initial Principal Amount of the Class A Certificates as of
October 1, 2001 was $242,002,896.00.

      The aggregate Initial Principal Amount of the Class M Certificates as of
October 1, 2001 was $4,250,000.00.

      The aggregate Initial Principal Amount of the Class B-1 Certificates as of
October 1, 2001 was $1,500,000.00.

      The aggregate Initial Principal Amount of the Class B-2 Certificates as of
October 1, 2001 was $875,000.00.

      The aggregate Initial Principal Amount of the Class B-3 Certificates as of
October 1, 2001 was $500,000.00.

      The aggregate Initial Principal Amount of the Class B-4 Certificates as of
October 1, 2001 was $375,000.00.

      The aggregate Initial Principal Amount of the Class B-5 Certificates as of
October 1, 2001 was $500,369.96.

      The Subordinated Certificate Percentage is 3.200106178325%.*

      The Class M Subordination Percentage is 1.500128386563%.*

      The Class B-1 Subordination Percentage is 0.900136224765%.*

      The Class B-2 Subordination Percentage is 0.550140797049%.*

      The Class B-3 Subordination Percentage is 0.350143409783%.*

      The Class B-4 Subordination Percentage is 0.200145369333%.*


--------

*     Equal to the Initial Principal Amount thereof divided by the aggregate
      Adjusted Balance of the Mortgage Loans.





                                   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 thereunto duly authorized.

                                            CITICORP MORTGAGE SECURITIES, INC.
                                            (Registrant)

                                            By: /s/ Howard Darmstadter
                                               -------------------------
                                                    Howard Darmstadter
                                                    Assistant Secretary


Dated: October 29, 2001