THORNBURG INVESTMENT TRUST
485BPOS, 1998-02-17
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                                                    33-14905

   Filed with the Securities and Exchange Commission
                 February 17, 1998     
                                                                  
          SECURITIES AND EXCHANGE COMMISSION
                Washington, D.C.  20549

                       FORM N-1A

REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933         [ ]
    Pre-Effective Amendment No.       [ ]
    Post-Effective Amendment No. 32   [x]     

                          and

REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940 [ ]
    Amendment No. 35                  [x]     

THORNBURG INVESTMENT TRUST (formerly "Thornburg Income Trust"     
(Exact Name of Registrant as Specified in Charter)

119 East Marcy Street, Suite 202, Santa Fe, NM  87501             
(Address of Principal Executive Office)      (Zip Code)

Registrant's Telephone Number, including Area Code
(505) 984-0200                                                    

H. Garrett Thornburg, Jr.
119 East Marcy Street, Suite 202
Santa Fe, New Mexico  87501                                       
(Name and Address of Agent for Service

It is proposed that this filing will become effective (check
appropriate box):

    [x]  Immediately upon filing pursuant to paragraph (b) of Rule 485
    [ ]  On (date) pursuant to paragraph (b)
    [ ]  60 days after filing pursuant to paragraph (a)
    [ ]  On [date] pursuant to paragraph (a)(1) 
    [ ]  75 days after filing pursuant to paragraph (a)(2)
    [ ]  On    [date]    pursuant to paragraph (a)(2)

    The Registrant has registered an indefinite number or amount of
securities in accordance with Rule 24 under the Securities Act of
1933, and filed a Rule 24f-2 Notice for the fiscal year ended 
September 30, 1997 on December 19, 1997.     


<PAGE>     
              THORNBURG INVESTMENT TRUST

    (i)    Thornburg Limited Term U.S. Government Fund
    (ii)   Thornburg Intermediate Municipal Fund
    (iii)  Thornburg New Mexico Intermediate Municipal Fund
    (iv)   Thornburg Texas Intermediate Municipal Fund
    (v)    Thornburg Limited Term Income Fund
    (vi)   Thornburg Alabama Intermediate Municipal Fund
    (vii)  Thornburg Arizona Intermediate Municipal Fund
    (viii) Thornburg Pennsylvania Intermediate Municipal Fund
    (ix)   Thornburg Florida Intermediate Municipal Fund
    (x)    Thornburg Tennessee Intermediate Municipal Fund
    (xi)   Thornburg Utah Intermediate Municipal Fund
    (xii)  Thornburg Value Fund
    (xiii) Thornburg New York Intermediate Municipal Fund

                            CONTENTS

Facing Sheet

Contents      

Cross Reference Sheets   (Thornburg Limited Term U.S. Government
                          Fund [Class A shares and Class C shares];
                          Thornburg Limited Term Income Fund 
                          [Class A shares and Class C shares])

Cross Reference Sheets   (Thornburg Intermediate Municipal Fund; 
                          [Class A and Class C shares]
                          Thornburg New Mexico Intermediate Municipal Fund
                          [Class A shares];
                          Thornburg Florida Intermediate Municipal Fund
                          [Class A shares]; 
                          Thornburg New York Intermediate Municipal Fund
                          [Class A shares];
                          Thornburg Alabama Intermediate Municipal Fund
                          [Class A shares and Class C shares];
                          Thornburg Arizona Intermediate Municipal Fund
                          [Class A shares and Class C shares];
                          Thornburg Pennsylvania Intermediate Municipal Fund 
                          [Class A shares and Class C shares];
                          Thornburg Tennessee Intermediate Municipal Fund    
                          [Class A shares and Class C shares]; 
                          Thornburg Texas Intermediate Municipal Fund
                          [Class A shares and Class C shares];
                          Thornburg Utah Intermediate Municipal Fund
                          [Class A shares and Class C shares])

Cross Reference Sheets   (Thornburg Value Fund [Class A shares and
                          Class C shares])

Cross Reference Sheets   (Thornburg Intermediate Municipal Fund 
                         [Institutional Class]; Thornburg Limited Term U.S.
                         Government Fund [Institutional Class]; Thornburg 
                         Limited Term Income Fund [Institutional Class];
                         Thornburg Value Fund [Institutional Class])

Prospectus               (Thornburg Limited Term U.S. Government Fund
                          [Class A shares and Class C shares];
                          Thornburg Limited Term Income Fund 
                          [Class A shares and Class C shares])

Prospectus               (Thornburg Intermediate Municipal Fund; 
                          [Class A and Class C shares]
                          Thornburg New Mexico Intermediate Municipal Fund
                          [Class A shares];
                          Thornburg Florida Intermediate Municipal Fund
                          [Class A shares]; 
                          Thornburg New York Intermediate Municipal Fund
                          [Class A shares];
                          Thornburg Alabama Intermediate Municipal Fund
                          [Class A shares and Class C shares];
                          Thornburg Arizona Intermediate Municipal Fund
                          [Class A shares and Class C shares];
                          Thornburg Pennsylvania Intermediate Municipal Fund 
                          [Class A shares and Class C shares];
                          Thornburg Tennessee Intermediate Municipal Fund    
                          [Class A shares and Class C shares]; 
                          Thornburg Texas Intermediate Municipal Fund
                          [Class A shares and Class C shares];
                          Thornburg Utah Intermediate Municipal Fund
                          [Class A shares and Class C shares])

Prospectus               (Thornburg Value Fund [Class A shares and
                          Class C shares])

Prospectus               (Thornburg Intermediate Municipal Fund
                          [Institutional Class shares];
                          Thornburg Limited Term U.S. Government Fund
                          [Institutional Class Shares];
                          Thornburg Limited Term Income Fund
                          [Institutional Class shares];
                          Thornburg Value Fund [Class A and
                          Class C shares])

Statement of Additional  (Thornburg Limited Term U.S. Government Fund
Information               [Class A shares and Class C shares];
                          Thornburg Limited Term Income Fund
                          [Class A shares and Class C shares])

Statement of Additional  (Thornburg Intermediate Municipal Fund
Information               [Class A shares and Class C shares]; 
                          Thornburg New Mexico Intermediate Municipal Fund
                          [Class A shares];
                          Thornburg Florida Intermediate Municipal Fund
                          [Class A shares]; 
                          Thornburg New York Intermediate Municipal Fund
                          [Class A shares];
                          Thornburg Alabama Intermediate Municipal Fund
                          [Class A shares and Class C shares];
                          Thornburg Arizona Intermediate Municipal Fund
                          [Class A shares and Class C shares];
                          Thornburg Pennsylvania Intermediate Municipal Fund 
                          [Class A shares and Class C shares];
                          Thornburg Tennessee Intermediate Municipal Fund    
                          [Class A shares and Class C shares]; 
                          Thornburg Texas Intermediate Municipal Fund
                          [Class A shares and Class C shares];
                          Thornburg Utah Intermediate Municipal Fund
                          [Class A shares and Class C shares])


Statement of Additional  (Thornburg Value Fund [Class A shares and
Information               Class C shares])

Statement of Additional  (Thornburg Intermediate Municipal Fund
Information               [Institutional Class shares];
                          Thornburg Limited Term U.S. Government Fund
                          [Institutional Class shares]; 
                          Thornburg Limited Term Income Fund
                          [Institutional Class shares]; and
                          Thornburg Value Fund
                          [Institutional Class shares])


Part C

Signature Page

Exhibits

<PAGE>     

              THORNBURG INVESTMENT TRUST
                 CROSS REFERENCE SHEETS
         ("Thornburg Limited Term Income Funds"
             [Class A and Class C shares])
       Thornburg Limited Term U.S. Government Fund
           Thornburg Limited Term Income Fund

Form N-1A Item Number
Part A                               Prospectus Caption

1 . . . . . . . . . . . . . . . . . . . . . .Cover Page
2 (a) . . . . . . . . . . . . . . . EXPENSE INFORMATION
2 (b) . . . . . . . . . . . . . . . . . . . . THE FUNDS
3 . . . . . . . . . . . . . . . . .FINANCIAL HIGHLIGHTS
4 (a)(i)  . . . . . . . . . . ORGANIZATION OF THE FUNDS
  (a)(ii), (b) & (c).INVESTMENT OBJECTIVES AND POLICIES
       5  . . . . . . . . . INFORMATION ABOUT THE FUNDS
  (a) . . . . . .Organization of the Funds; TMC and TSC
  (b) . . . . . . . . . . . . . . . . . . . TMC and TSC
  (c) . . . . . . . . . . . . . . . . . . . TMC and TSC
  (d) . . . . . . . . . . . . . . . . . . . TMC and TSC
                                          Outside Cover
  (e) . . . . . . . . . . . . . . . . . . Outside Cover
  (f) . . . . . . . . . . . . . . . . . . . TMC and TSC
  (g) . . . . . . . . . . . . . . . . .  Not Applicable
5 A . . . . . MANAGEMENT DISCUSSION OF FUND PERFORMANCE
6 (a) . . . . . . . . . . . . Organization of the Funds
                              Organization of the Funds
  (b) . . . . . . . . . . . . . . . . .  Not Applicable
  (c) . . . . . . . . . . . . . . . . .  Not Applicable
  (d) . . . . . . . . . . . . . . . . .  Not Applicable
  (e) . . . . . . . . . . Cover Page; INVESTOR SERVICES
  (f) . . . . . . . .  SHAREHOLDER AND ACCOUNT POLICIES
  (g) . . . . . . . . . . . . . . . . . . . . . . TAXES
  (h) . . . . . . . .  YOUR ACCOUNT; Buying Fund Shares
7 (a) . . . . . . . . . . . . . . . . . . Outside Cover
  (b), (c), (d) . . . YOUR ACCOUNT / Buying Fund Shares
  (e) . .  SERVICE AND DISTRIBUTION PLANS; Service Plan
  (f) . . . . . . . . .  SERVICE AND DISTRIBUTION PLANS
8 . . . . . . . . . . . . . . . . . SELLING FUND SHARES
  (a), (b)  . . . . . . . . . . . . SELLING FUND SHARES
  (c) . . . . . . . . . . . . . . . SELLING FUND SHARES
  (d) . . . . . . . . . . . . . . . Transaction Details
9 . . . . . . . . . . . . . . . . . . .  Not Applicable

Part B              Statement of Additional Information

10  . . . . . . . . . . . . . . . . . . . . .Cover Page
11  . . . . . . . . . . . . . . . . . TABLE OF CONTENTS
12  . . . . . . . . . . . . . . . . . .  Not Applicable
13
  (a) . . . . . . .  INVESTMENT OBJECTIVES AND POLICIES
  (b) . . . . . . . . . . . . . .INVESTMENT LIMITATIONS
  (c) . . . . . . . .INVESTMENT OBJECTIVES AND POLICIES
  (d) . . . . . . . .INVESTMENT OBJECTIVES AND POLICIES
14 (a), (b) . . . . . . . . . . . . . . . . .MANAGEMENT
   (c)  . . . . . . . . . . . . . . . .  Not Applicable
15  . . . . . . . . . . . . . . . . . .  Not Applicable
16 (a), (b), (c). . . . . . . . .INVESTMENT ADVISER AND
                         INVESTMENT ADVISORY AGREEMENT;
                                             MANAGEMENT
  (d) . . . . . . . . . . . . . . . . .  Not Applicable
  (e) . . . . . . . . . . . . . . . . .  Not Applicable
  (f) . . . . . . . . . . . . .  INVESTMENT ADVISER AND
                         INVESTMENT ADVISORY AGREEMENT;
                         SERVICE AND DISTRIBUTION PLANS
  (g) . . . . . . . . . . . . . . . . .  Not Applicable
  (h) . . . . . . . . .Prospectus; INDEPENDENT AUDITORS
  (i) . . . . . . . . . . . . . . . . .  Not Applicable
17  . . . . . . . . . . . . . .  PORTFOLIO TRANSACTIONS
18  . . . . . . . . . . . . . . . . . . . .  Prospectus
19  . . . . . . . . Prospectus; PURCHASE OF FUND SHARES
20  . . . DISTRIBUTIONS, TAXES AND SHAREHOLDER ACCOUNTS
21  . . . . . . . . . . . . . . . . . . . . DISTRIBUTOR
22  . . . . . . . . . DETERMINATION OF NET ASSET VALUE;
                                      YIELD COMPUTATION
23  . . . . . . . . . . . . . . .  FINANCIAL STATEMENTS


<PAGE>        THORNBURG INVESTMENT TRUST 
                CROSS REFERENCE SHEETS
       ("Thornburg Intermediate Municipal Funds"
         [Class A shares and Class C shares])
         Thornburg Intermediate Municipal Fund
   Thornburg New Mexico Intermediate Municipal Fund
     Thornburg Florida Intermediate Municipal Fund
    Thornburg New York Intermediate Municipal Fund
     Thornburg Alabama Intermediate Municipal Fund
     Thornburg Arizona Intermediate Municipal Fund
  Thornburg Pennsylvania Intermediate Municipal Fund
    Thornburg Tennessee Intermediate Municipal Fund
      Thornburg Texas Intermediate Municipal Fund
      Thornburg Utah Intermediate Municipal Fund

Form N-1A Item Number
Part A                               Prospectus Caption

1 . . . . . . . . . . . . . . . . . . . . . .Cover Page
2 (a) . . . . . . . . . . . . . . . EXPENSE INFORMATION
  (b) . . . . . . . . . . . . . . . . .  Not Applicable
3 . . . . . . . . . . . . . . . .  FINANCIAL HIGHLIGHTS
4 (a)(i). . . . . . . .Special Considerations Affecting
                                    Single-State Funds;
                              Organization of the Funds
                              Organization of the Funds
  (a)(ii), (b) & (c).INVESTMENT OBJECTIVES AND POLICIES
5 . . . . . . . . . . . . . INFORMATION ABOUT THE FUNDS
  (a) . . . . . .Organization of the Funds; TMC and TSC
  (b) . . . . . . . . . . . . . . . . . . . TMC and TSC
  (c) . . . . . . . . . . . . . . . . . . . TMC and TSC
  (d) . . . . . . . . . . . . . . . . . . . TMC and TSC
                                          Outside Cover
  (e) . . . . . . . . . . . . . . . . . . Outside Cover
  (f) . . . . . . . . . . . . . . . . . . . TMC and TSC
  (g) . . . . . . . . . . . . . . . . .  Not Applicable
5 A . . . . . MANAGEMENT DISCUSSION OF FUND PERFORMANCE
6 (a) . . . . . . . . . . . . Organization of the Funds
                              Organization of the Funds
  (b) . . . . . . . . . . . . . . . . .  Not Applicable
  (c) . . . . . . . . . . . . . . . . .  Not Applicable
  (d) . . . . . . . . . . . . . . . . .  Not Applicable
  (e) . . . . . . . . . . Cover Page; INVESTOR SERVICES
  (f) . . . . . . . .  SHAREHOLDER AND ACCOUNT POLICIES
  (g) . . . . . . . . . . . . . . . . . . . . . . TAXES
  (h) . . . . . . . .  YOUR ACCOUNT; Buying Fund Shares
7 (a) . . . . . . . . . . . . . . . . . . Outside Cover
  (b), (c), (d) . . . YOUR ACCOUNT / Buying Fund Shares
  (e) . .  SERVICE AND DISTRIBUTION PLANS; Service Plan
  (f) . . . . . . . . .  SERVICE AND DISTRIBUTION PLANS
8 . . . . . . . . . . . . . . . . . SELLING FUND SHARES
  (a), (b)  . . . . . . . . . . . . SELLING FUND SHARES
  (c) . . . . . . . . . . . . . . . SELLING FUND SHARES
  (d) . . . . . . . . . . . . . . . Transaction Details
9 . . . . . . . . . . . . . . . . . . .  Not Applicable

Part B              Statement of Additional Information

10  . . . . . . . . . . . . . . . . . . . .  Cover Page
11  . . . . . . . . . . . . . . . . . TABLE OF CONTENTS
12  . . . . . . . . . . . . . . . . . .  Not Applicable
13
  (a) . . . . . . .  INVESTMENT OBJECTIVES AND POLICIES
  (b) . . . . . . . . . . . . .  INVESTMENT LIMITATIONS
  (c) . . . . . . .  INVESTMENT OBJECTIVES AND POLICIES
  (d) . . . . . . .  INVESTMENT OBJECTIVES AND POLICIES
                     Investment Policies and Techniques
14 (a), (b) . . . . . . . . . . . . . . . .  MANAGEMENT
   (c). . . . . . . . . . . . . . . . .  Not Applicable
15  . . . . . . . . . . . . . . . . . .  Not Applicable
16 (a), (b), (c)                 INVESTMENT ADVISER AND
                         INVESTMENT ADVISORY AGREEMENT;
                                             MANAGEMENT
  (d) . . . . . . . . . . . . . . . . .  Not Applicable
  (e) . . . . . . . . . . . . . . . . .  Not Applicable
  (f) . . . . . . . . . . . . . .INVESTMENT ADVISER AND
                          INVESTMENT ADVISORY AGREEMENT
 . . . . . . . . . . . . .SERVICE AND DISTRIBUTION PLANS
  (g) . . . . . . . . . . . . . . . . .  Not Applicable
  (h) . . . . . . . .  Prospectus; INDEPENDENT AUDITORS
  (i) . . . . . . . . . . . . . . . . .  Not Applicable
17. . . . . . . . . . . . . . .  PORTFOLIO TRANSACTIONS
18  . . . . . . . . . . . . . . . . . . . .  Prospectus
19  . . . . . . . . Prospectus; PURCHASE OF FUND SHARES
20  . . . DISTRIBUTIONS, TAXES AND SHAREHOLDER ACCOUNTS
21  . . . . . . . . . . . . . . . . . . . . DISTRIBUTOR
22  . . . . . . . . . DETERMINATION OF NET ASSET VALUE;
                                      YIELD COMPUTATION
23  . . . . . . . . . . . . . Incorporated by reference


<PAGE>
              THORNBURG INVESTMENT TRUST 
                CROSS REFERENCE SHEETS
                 Thornburg Value Fund
          [Class A shares and Class C Shares]

Form N-1A Item Number
Part A                               Prospectus Caption
1 . . . . . . . . . . . . . . . . . . . . .  Cover Page
2 (a) . . . . . . . . . . . . . . . . . . . . KEY FACTS
  (b) . . . . . . . . . . . . . . . . . . . . KEY FACTS
3 . . . . . . . . . . . . . . . . . . .  Not Applicable
4 (a)(i). . . . . . . . . . . . . .  THE FUND IN DETAIL
                               Organization of the Fund
      (ii)  . . . . . . . . . . . . . . . . . KEY FACTS
                                   The Fund at a Glance
                       INVESTMENT PRINCIPLES AND RISKS;
                   SECURITIES AND INVESTMENT PRACTICES;
       FUNDAMENTAL INVESTMENT POLICIES AND RESTRICTIONS
   (b). . . . . . . . .INVESTMENT PRINCIPLES AND RISKS;
                    SECURITIES AND INVESTMENT PRACTICES
5 (a) . . . . . . . . . . . . . . .  THE FUND IN DETAIL
                               Organization of the Fund
  (b), (c). . . . . . . . . . . . . .THE FUND IN DETAIL
                                            TMC and TSC
                                         Management Fee
5 A . . . . . . . . . . . . . . . . . .  Not Applicable
6 (a) . . . . . . . . . . . . . . .  THE FUND IN DETAIL
                               Organization of the Fund
  (b) . . . . . . . . . . . . . . . . .  Not Applicable
  (c) . . . . . . . . . . . . . . . . .  Not Applicable
  (d) . . . . . . . . . . . . . . . . .  Not Applicable
  (e) . . . . . . . . . . . . . . . .THE FUND IN DETAIL
                                            TMC and TSC
  (f), (g). . . . . .  SHAREHOLDER AND ACCOUNT POLICIES
  (h) . . . . . . . . . . . . . . .  BUYING FUND SHARES
7 (a) . . . . . . . . . . . . . . . .THE FUND IN DETAIL
                                            TMC and TSC
  (b), (c), (d) . . . . . . . . . .  BUYING FUND SHARES
  (e), (f). . . . . . .  SERVICE AND DISTRIBUTION PLANS
  (g) . . . . . . . . . . . . . . . .BUYING FUND SHARES
                                        Class B Shares;
                                    SELLING FUND SHARES
8 (a), (b), (c) . . . . . . . . . . SELLING FUND SHARES
  (d) . . . . . . . . . . . . . . . TRANSACTION DETAILS
9 . . . . . . . . . . . . . . . . . . .  Not Applicable

Part B              Statement of Additional Information

10. . . . . . . . . . . . . . . . . . . . .  Cover Page
11  . . . . . . . . . . . . . . . . . TABLE OF CONTENTS
12  . . . . . . . . . . . . . . . . . . . .  Cover Page
13
  (a) . . . . . . . INVESTMENT POLICIES AND LIMITATIONS
  (b) . . . . . . . INVESTMENT POLICIES AND LIMITATIONS
  (c) . . . . . . . INVESTMENT POLICIES AND LIMITATIONS
  (d) . . . . . . . . . . . . . . . . . . .  Prospectus
14 (a), (b) . . . . . . . . . . . TRUSTEES AND OFFICERS
   (c). . . . . . . . . . . . . . . . .  Not Applicable
15  . . . . . . . . . . . . . . . . . .  Not Applicable
16 (a), (b), (c). . . . . . . .  INVESTMENT ADVISER AND
                          INVESTMENT ADVISORY AGREEMENT
  (d)                            INVESTMENT ADVISER AND
                          INVESTMENT ADVISORY AGREEMENT
  (e) . . . . . . . . . . . . . . . . .  Not Applicable
  (f) . . . . . . . . . . . . . INVESTMENT ADVISORY AND
                     ADMINISTRATIVE SERVICES AGREEMENTS
                         SERVICE AND DISTRIBUTION PLANS
  (g) . . . . . . . . . . . . . . . . .  Not Applicable
  (h) . . . . . . . .  Prospectus; INDEPENDENT AUDITORS
  (i) . . . . . . . . . . . . . . . . .  Not Applicable
17. . . . . . . . . . . . . . .  PORTFOLIO TRANSACTIONS
18  . . . . .  Prospectus; CONVERSION OF CLASS B SHARES
19  . . . . . . . . . . . . . . . . . . . . Prospectus;
         ADDITIONAL PURCHASE AND REDEMPTION INFORMATION
20  . . . . . . . . . . . . . . DISTRIBUTIONS AND TAXES
21  . . . . . . . . . . . . . . . . . . . . DISTRIBUTOR
22  . . . . . . . . . . . . . . . . . . . . PERFORMANCE
23  . . . . . . . . . . . . . . .  FINANCIAL STATEMENTS


<PAGE>     
              THORNBURG INVESTMENT TRUST 
                CROSS REFERENCE SHEETS
        Thornburg Intermediate Municipal Fund
                 [Institutional Class]
      Thornburg Limited Term U.S. Government Fund
                 [Institutional Class]
          Thornburg Limited Term Income Fund
                 [Institutional Class]
                 Thornburg Value Fund
                 [Institutional Class]

Form N-1A Item Number
Part A                               Prospectus Caption

1 . . . . . . . . . . . . . . . . . . . . . .Cover Page
2 (a) . . . . . . . . . . . . . . . EXPENSE INFORMATION
  (b) . . . . . . . . . . . . . . . . .  Not Applicable
3 . . . . . . . . . . . . . . . . . . .  Not Applicable
4 (a)(i). . . . . . . . . . . ORGANIZATION OF THE FUNDS
  (a)(ii), (b) & (c).INVESTMENT OBJECTIVES AND POLICIES
5 . . . . . . . . . . . . .  ORGANIZATION OF THE FUNDS;
                                            TMC and TSC
5 A . . . . . . . . . . . . . . . . . .  Not Applicable
6 (a) . . . . . . . . . . . . ORGANIZATION OF THE FUNDS
  (b) . . . . . . . . . . . . . . . . .  Not Applicable
  (c) . . . . . . . . . . . . . . . . .  Not Applicable
  (d) . . . . . . . . . . . . . . . . . . .  Cover Page
  (e) . . . . . . . . . . Cover Page; INVESTOR SERVICES
  (f) . . . . . . . .  SHAREHOLDER AND ACCOUNT POLICIES
  (g) . . . . . . . . . . . . . . . . . . . . . . TAXES
  (h) . . . . . . . . . . . . . . . . . . . Cover Page;
                      YOUR ACCOUNT - Buying Fund Shares
7 (a) . . . . . . . . . . . . .  ADDITIONAL INFORMATION
  (b), (c), (d) . . . . . . . . . . . . . YOUR ACCOUNT;
                                    TRANSACTION DETAILS
8 (a), (b), (c) and (d) . . . . . . SELLING FUND SHARES
9 . . . . . . . . . . . . . . . . . . .  Not Applicable

Part B              Statement of Additional Information

10  . . . . . . . . . . . . . . . . . . . .  Cover Page
11  . . . . . . . . . . . . . . . . . TABLE OF CONTENTS
12  . . . . . . . . . . . . . . . . . . . .  Cover Page
13  . . . . . . . .  INVESTMENT OBJECTIVES AND POLICIES
14  . . . . . . . . . . . . . . . . . . . .  MANAGEMENT
15  . . . . . . . . . . . . . . . . . .  Not Applicable
16  .INVESTMENT ADVISER, INVESTMENT ADVISORY AGREEMENTS
                AND ADMINISTRATIVE SERVICES AGREEMENTS;
                                                       
17. . . . . . . . . . . . . . .  PORTFOLIO TRANSACTIONS
18  . . . . . . . . . . . . . . . . . . . .  Prospectus
19  . . . . . . . . . . . . . . . . . . . .  Prospectus
20  . . . . . . . . . . . . . . . . . . . . . . . TAXES
21  . . . . . . . . . . . . . . . . . . . . DISTRIBUTOR
22  . . . . . . . . . YIELD AND PERFORMANCE INFORMATION
23  . . . . . . . . . . . . . . .  FINANCIAL STATEMENTS

                                  PART A

(no prospectuses included)

                                  PART B

(no Statements of Additional Information included)

<PAGE>
                                  PART C
                             OTHER INFORMATION

Items 23 and 24.  Financial Statements and Exhibits.

   (a)   Financial Statements

         (i)   Thornburg Limited Term U.S. Government Fund (Class A, 
               Class C and Class I shares),
         (ii)  Thornburg Limited Term Income Fund (Class A, 
               Class C and Class I shares), 
         (iii) Thornburg Intermediate Municipal Fund (Class A, 
               Class C and Class I shares),
         (iv)  Thornburg New Mexico Intermediate Municipal Fund (Class A 
               shares),
         (v)   Thornburg Florida Intermediate Municipal Fund (Class A 
               shares),
         (vi)  Thornburg Value Fund (Class A and Class C shares):     
               Reports of Independent Auditors dated October 24, 1997,
               Statements of Assets and Liabilities including Schedules of
               Investments as of September 30, 1997, Statements of
               Operations for the year ended September 30, 1997, Statements
               of Changes in Net Assets for the two years ended
               September 30, 1997, Notes to Financial Statements, Financial
               Highlights are incorporated by reference to Registrant's
               1997 Annual Reports to Shareholders in respect of Thornburg 
               Limited Term U.S. Government Fund, Thornburg Limited Term
               Income Fund, Thornburg Intermediate Municipal Fund,
               Thornburg New Mexico Intermediate Municipal Fund, and
               Thornburg Florida Intermediate Municipal Fund, and Thornburg
               Value Fund previously filed with the Securities and Exchange
               Commission, and
         (vii) Thornburg New York Intermediate Municipal Fund: Statement of
               Assets and Liabilities including Schedule of Investments as
               of October 31, 1997, Statement of Operations for the period
               ended October 31, 1997, Statement of Changes in Net Assets
               for the period ended October 31, 1997, Notes to Financial
               Statements and Financial Highlights are filed as an exhibit
               hereto.     

   (b)   Exhibits

The following Exhibits are incorporated herein by reference to Registrant's
Registration Statement on Form N-1A as initially filed on June 12, 1987.

      (1)    Limited Term Trust, Agreement and Declaration of Trust,
             dated June 3, 1987.

      (2)    By-Laws of Limited Term Trust, dated June 3, 1987.

      (3)    Not applicable.

      (4)    Not applicable.

      (5)    Form of Investment Advisory Agreement between
             Registrant and Thornburg Management Company, Inc. 

      (6)    (a)   Form of Distribution Agreement between Registrant
                   and Thornburg Securities Corporation.

             (b)   Form of Agency Agreement.

      (7)    Not applicable.

      (11)   Not applicable.

      (12)   Not applicable.

      (13)   Form of Subscription to Shares by Thornburg Management
             Company, Inc.

      (15)   Form of Plan and Agreement of Distribution Pursuant to
             Rule 12b-1 between Registrant and Thornburg Management
             Company, Inc.


The following exhibits are incorporated herein by reference to Registrant's
pre-effective amendment No. 1 to its Registration Statement on Form N-1A as
filed on October 28, 1987:

      (1)    Thornburg Income Trust - First Amendment and Supplement
             to Agreement and Declaration of Trust, dated August 11,
             1987.

      (8)    Form of Custodian Agreement between Registrant and
             State Street Bank and Trust Company.  This exhibit
             supersedes the form of Custodian Agreement filed with
             the Registrant's initial Registration Statement on Form
             N-1A on June 12, 1987.

      (9)    Form of Transfer Agency Agreement between Registrant
             and State Street Bank and Trust Company.  This exhibit
             supersedes the form of Transfer Agency Agreement filed
             with the Registrant's initial Registration Statement on
             Form N-1A on June 12, 1987.

The following exhibits are incorporated herein by reference to Registrant's
post-effective amendment No. 1 to its Registration Statement on Form N-1A 
as filed on March 3, 1988:

      (1)    Thornburg Income Trust-Second Amendment and Supplement
             to Agreement and Declaration of Trust, dated October 28,
             1987.

The following exhibits are incorporated herein by reference to Registrant's
post-effective amendment No. 7 to its Registration Statement on Form N-1A 
as filed on April 19, 1991:

      (16)   Powers of Attorney from Messrs. Bemis, Smith and
             Thornburg. 

The following exhibits are incorporated herein by reference to Registrant's
post-effective amendment No. 9 to its Registration Statement on Form N-1A 
as filed on March 3, 1992:

      (16)   Power of Attorney from J. Burchenal Ault

The following exhibits are incorporated herein by reference to the
Registrant's post-effective amendment No. 10 to its Registration Statement 
on Form N-1A as filed on July 23, 1992:

      (5)    Revised form of Investment Advisory Agreement between
             Registrant and Thornburg Management Company, Inc.

      (13)   Form of Subscription to Shares

      (15)   Revised form of Plan and Agreement of Distribution
             Pursuant to Rule 12b-1 between Registrant and Thornburg
             Management Company, Inc.

The following exhibits are incorporated herein by reference to the
Registrant's post-effective amendment No. 13 to its Registration Statement 
on Form N-1A as filed on December 3, 1993:

      (1)    Thornburg Income Trust -- Third, Fourth, Fifth, Sixth
             and Seventh Amendments and Supplements to Agreement and
             Declaration of Trust

The following exhibits are incorporated herein by reference to the
Registrant's post-effective amendment No. 14 to its Registration Statement 
on Form N-1A as filed on May 13, 1994:

      (18)   Power of attorney (B. McMahon)

The following exhibits are incorporated herein by reference to the
Registrant's post-effective amendment no. 17 to its Registration Statement 
on Form N-1A as filed on July 27, 1994:

      (1)    Thornburg Income Trust Amended and Restated Designation
             of Series.

      (15.2) Form of Plan and Agreement pursuant to Rule 12b-1
             (Class B Distribution Plan)

      (15.3) Form of Plan and Agreement pursuant to Rule 12b-1
             (Class C Distribution Plan)

The following exhibits are incorporated herein by reference to the
Registrant's post-effective amendment no. 18 to its Registration Statement 
on Form N-1A as filed on December 3, 1994:

      (15.2) Form of Plan and Agreement pursuant to Rule 12b-1
             (Class B Service Plan)

      (15.3) Form of Plan and Agreement pursuant to Rule 12b-1
             (Class C Service Plan)

The following exhibits are incorporated by reference to the Registrant's
post-effective amendment no. 20 to its Registration Statement on Form N-1A 
as filed on July 5, 1995:

      (1.1)  Thornburg Income Trust -- Ninth Amendment and
             Supplement to Agreement and Declaration of Trust

      (1.2)  Thornburg Income Trust -- Tenth Amendment and
             Supplement to Agreement and Declaration of Trust

      (5)    Investment Advisory Agreement -- in respect of
             Thornburg Value Fund

      (15.1) Form of Plan and Agreement Pursuant to Rule 12b-1
             (Service Plan -- all classes) -- Thornburg Value Fund

      (15.2) Form of Plan and Agreement Pursuant to Rule 12b-1
             (Class B Distribution Plan) -- Thornburg Value Fund

      (15.3) Form of Plan and Agreement Pursuant to Rule 12b-1
             (Class C Distribution Plan) -- Thornburg Value Fund

      (19)   Power of attorney from David A. Ater

The following exhibit is incorporated by reference to the Registrant's 
post-effective amendment no. 22 to its Registration Statement on Form N-1A 
as filed on October 2, 1995:

      (1)    Thornburg Income Trust -- Corrected Tenth Amendment
             and Supplement to Agreement and Declaration of Trust 

The following exhibits are incorporated by reference to the Registrant's 
post-effective amendment no. 26 to its Registration Statement on Form N-1A 
as filed on May 6, 1996:

      (1)    First Supplement to Amended and Restated Designation of Series

     (15)    Form of Institutional Class Service Plan (12b-1 plan and
             agreement)

The following exhibits are incorporated by reference to the Registrant's 
post-effective amendment no. 27 to its Registration Statement on Form N-1A 
as filed on August 30, 1996:

      (5)    Form of Restated Investment Advisory Agreement

      (9)    Form of Administrative Services Agreement

The following exhibits are incorporated by reference from the Registrant's 
post-effective amendment no. 29 to its Registration Statement on Form N-1A 
as filed on March 14, 1997:

      (1.1)  Eleventh Amendment and Supplement to Agreement and Declaration
             of Trust

      (1.2)  Twelfth Amendment and Supplement to Agreement and Declaration
             of Trust

      (5)    Amended Form of Restated Investment Advisory Agreement (re
             Thornburg New York Intermediate Municipal Fund)

      (9)    Form of Administrative Services Agreement (re Class A Shares
             of Thornburg New York Intermediate Municipal Fund)

      (11.1) Consent of Counsel to be named in registration statement

      (11.2) Consent of McGladrey & Pullen, LLP, independent auditors, to
             be named in registration statement (re Thornburg New York
             Intermediate Municipal Fund)

      (14)   Model IRA Plan

      (15)   Form of Class A Service Plan for Thornburg New York
             Intermediate Municipal Fund (12b-1 plan and agreement)

      (19.1) Power of attorney from Brian J. McMahon

      (19.2) Power of attorney from James W. Weyhrauch

     The following exhibits are incorporated by reference from the 
Registrant's post-effective amendment no. 30 to its Registration Statement 
on Form N-1A as filed on September 3, 1997:
 
      (11.2) Consent of McGladrey & Pullen, LLP, independent auditors, to
             be named in registration statement (re Thornburg New York
             Intermediate Municipal Fund)

      (18)   Rule 18f-3 plan

    The following exhibits are incorporated by reference from the 
Registrant's post-effective amendment no. 31 to its Registration Statement 
on Form N-1A as filed on December 3, 1997:

      (11.1) Consent of Counsel to be named in registration statement

      (11.2) Consent of McGladrey & Pullen, LLP, independent auditors, to
             be named in registration statement (re Thornburg New York
             Intermediate Municipal Fund)

      (16.1) Schedules of performance computations as of September 30, 1997
             for Thornburg Limited Term U.S. Government Fund (Class A,
             Class C and Class I shares); Thornburg Limited Term Income
             Fund (Class A, Class C and Class I shares); Thornburg
             Intermediate Municipal Fund (Class A, Class C and Class I
             shares); Thornburg New Mexico Intermediate Municipal Fund
             (Class A shares); Thornburg Florida Intermediate Municipal
             Fund (Class A shares); Thornburg Value Fund (Class A and
             Class C shares)

      (16.2) Financial data schedules as of September 30, 1997 for
             Thornburg Limited Term U.S. Government Fund, Thornburg
             Limited Term Income Fund, Thornburg Intermediate Municipal
             Fund, Thornburg New Mexico Intermediate Municipal Fund,
             Thornburg Florida Intermediate Municipal Fund and Thornburg
             Value Fund

    

    The following exhibits are filed herewith:

      (5)    Amended and Restated Investment Advisory Agreement

      (6)    Thornburg Investment Trust Distribution Agreement

      (9.1)  Administrative Services Agreement (Class A and Class C shares)

      (9.2)  Administrative Services Agreement (Class I Shares)

      (9.3)  Memorandum of Reimbursement

      (12)   Thornburg New York Intermediate Municipal Fund Statement of
             Assets and Liabilities including Schedule of Investment as of
             October 31, 1997, Statement of Operations for the period ended
             October 31, 1997, Statement of Changes in Net Assets for the
             period ended October 31, 1997, Notes to Financial Statements
             and Financial Highlights

      (15.1) Plan and Agreement of Distribution Pursuant to Rule 12b-1
             (Service Plan - Classes A, C and I) 

      (15.2) Plan and Agreement of Distribution Pursuant to Rule 12b-1
             (Distribution Plan - Class C)     

Item 25.  Persons Controlled By or Under Common Control With Registrant.

          Not applicable.

Item 26.     Number of Record Holders of Securities (as of December 31, 
1997). 

          Title of Series (active series only)     No. of Holders
          ------------------------------------     --------------
          Thornburg Limited Term U.S. Government Fund . . . 3,917

          Thornburg Intermediate Municipal Fund . . . . . . 6,232

          Thornburg New Mexico Intermediate Municipal Fund. 2,508

          Thornburg Florida Intermediate Municipal Fund . .   338

          Thornburg New York Intermediate Municipal Fund . .  789

          Thornburg Limited Term Income Fund. . . . . . . . 1,344

          Thornburg Value Fund. . . . . . . . . . . . . . . 3,485
    

Item 27.   Indemnification.

      (1)   Please see Section 10.2 of the Agreement and  Declaration of
Trust filed as Exhibit 1.  Section 10.2 generally provides that each of the
Trust's officers and Trustees will be indemnified by the Trust against
liability and expenses in connection with his having been a Trustee or
officer unless it is determined that the individual is liable by reason of
willful misfeasance, bad faith, gross negligence or reckless disregard of 
the duties involved in the conduct of his office, or if the individual did 
not act in good faith in the reasonable belief that the action was in the 
Trust's best interest.

      (2)   Please see Section 7 of the Distribution Agreement filed as
Exhibit 6(a).  Section 7 generally provides that the Trust will indemnify
TSC, its officers and directors, and its controlling persons against 
liabilities and expenses incurred because of any alleged untrue statement 
of material fact contained in the Registration Statement, Prospectus or 
annual or interim reports to shareholders, or any alleged omission to state 
a material fact required to be stated therein, or necessary to make the
statements therein, not misleading, except where (i) the untrue statement 
or omission arises from information furnished by TSC, or (ii) to the extent 
the prospective  indemnitee is an officer, trustee or controlling person  
of the Trust, the indemnification is against public policy as expressed in 
the 1933 Act, or (iii) the liability or expense arises from TSC's willful 
misfeasance, bad faith, gross negligence, reckless performance of duties, 
or reckless disregard of its obligations and duties under the Distribution 
Agreement. Further, TSC agrees to indemnify the Trust, its officers and 
trustees, and its controlling persons in certain circumstances.

      (3)   The directors and officers of TMC are insured, and it is 
intended that the Trustees and officers of the Trust will become insured, 
under a joint professional and directors and officers liability policy.  
The described individuals are referred to as the "insureds."  The policy 
covers amounts which the insureds become legally obligated to pay by reason 
of the act, error, omission, misstatement, misleading statement or neglect 
or breach of duty in the performance of their duties as directors, trustees 
and officers.  In addition, the policy covers TMC, and is proposed to cover 
the Registrant, to the extent that they have legally indemnified the 
insureds for amounts incurred by the insureds as described in the preceding 
sentence.  The coverage excludes amounts that the insureds become obligated 
to pay by reason of conduct which constitutes willful misfeasance, bad 
faith, gross negligence or reckless disregard of the insured's duties. The 
application of the foregoing provisions is limited by the following 
undertaking set forth in the rules promulgated by the Securities and 
Exchange Commission:

          Insofar as indemnification for liabilities arising
          under the Securities Act of 1933 may be permitted to
          Trustees, officers and controlling persons of the
          Registrant pursuant to the foregoing provisions, or
          otherwise, the Registrant has been advised that in the
          opinion of the Securities and Exchange Commission such
          indemnification is against public policies expressed 
          in such Act and that if a claim for indemnification
          against such liabilities other than the payment by the
          Registrant of expenses incurred or paid by a Trustee,
          officer or controlling person of the Registrant in the
          successful defense of any action, suit or proceeding)
          is asserted by such Trustee, officer or controlling
          person in connection with the securities being
          registered, the Registrant will, unless in the opinion
          of its counsel the matter has been settled by
          controlling precedent, submit to a court of
          appropriate jurisdiction the question whether such
          indemnification by it is against public policy as
          expressed in such Act and will be governed by the
          final adjudication of such issue.

Item 28.   Business and Other Connections of the Investment Adviser.  See
"MANAGEMENT" in the Statement of Additional Information.

Item 29.   Principal Underwriters.

     (a)  The principal underwriter for the Registrant will be Thornburg
Securities Corporation ("TSC").  TSC is registered as a broker-dealer under
the Securities Exchange Act of 1934 and is a member of the National
Association of Securities Dealers, Inc.  TSC was formed for the purpose of
distributing the shares of the Registrant's series and other registered 
investment companies sponsored by its affiliates, and does not currently 
engage in the general securities business.


     (b)  The address of each of the directors and officers of TSC is 119
East Marcy Street, Suite 202, Santa Fe, New Mexico 87501.

                              Positions and            Positions and 
                              Offices                  Offices
Name                          with TSC                 with Registrant
- ----------------------        --------------           --------------------
H. Garrett Thornburg, Jr.     Director                 Trustee; President
Kenneth Ziesenheim            President                Vice President
Dawn B. Fischer               Secretary                Secretary and 
                                                       Assistant Treasurer

     (c)  Not applicable.

Item 30.  Location  of Accounts and Records.

All accounts, books and other documents required to be maintained by 
Section 31(a) of the Investment Company Act of 1940 and the rules 
thereunder are maintained at the offices of State Street Bank and Trust 
Company, at 470 Atlantic Avenue, Fifth Floor, Boston, Massachusetts 02210.

Item 31.  Management Services.

    The Registrant and Thornburg Management Company, Inc. ("TMC") have 
agreed that TMC will perform for the Registrant certain telephone answering 
services previously performed by the Registrant's transfer agent, National 
Financial Data Services, Inc. ("NFDS").  These telephone services include 
answering telephone calls placed to the Registrant or its transfer agent by
shareholders, securities dealers and others through the Registrant's toll
free number, and responding to those telephone calls by answering 
questions, effecting certain shareholder transactions described in the 
Registrant's current prospectuses, and performing such other, similar 
functions as the Registrant may reasonably prescribe from time to time.  
The Registrant will pay one dollar for each telephone call, which was the 
charge previously imposed by the Registrant's transfer agent for this 
service.  The Registrant's transfer agent will no longer charge for this 
service.  The Registrant understands that (i) the telephone answering 
service provided by TMC will be superior to that previously provided by the 
transfer agent because TMC will devote greater attention to training the 
telephone personnel, and those personnel will have immediate access to the 
Registrant's and TMC's management, (ii) the per-call charge imposed upon 
the Registrant for this service will be no greater than that charged by the 
Registrant's transfer agent, and (iii) TMC will not receive any profit from 
providing this service.  The Registrant will reimburse TMC for a portion of 
the depreciation on certain telephone answering equipment purchased by TMC 
to render the described services.  The Registrant paid $44,552.67, 
$73,536.38 and $20,906 to TMC under the described arrangements in each of 
the three most recent fiscal years ended September 30, 1995, 1996 and 1997. 
It is not believed that these arrangements constitute a management-related 
services agreement.     

Item 32.  Undertakings.  Not applicable.


<PAGE>     
                                SIGNATURES

     Pursuant to the requirements of the Securities Act of 1933 and the
Investment Company Act of 1940 the Registrant has duly caused this 
Registration Statement to be signed on its behalf by the undersigned, 
thereto duly authorized, in the City of Santa Fe, and State of New Mexico 
on the 17th day of February, 1998. In accordance with Rule 485(b) under the 
Securities Act of 1933, the Registrant represents that this amendment to 
its Registration Statement is filed solely for one or more of the purposes 
specified in Rule 485(b)(1), and that no material event requiring 
disclosure in the Registrant's prospectuses has occurred since the 
effective date of the Registrant's most recent post-effective amendment 
which included a prospectus.    


THORNBURG INVESTMENT TRUST
Registrant

By:               *                       
   ____________________________________
   H. Garrett Thornburg, Jr., President

   Pursuant to the requirements of the Securities Act of 1933, this 
Registration Statement has been signed below by the following persons in 
the capacities and on the date indicated.

                 *                       
_________________________________________
H. Garrett Thornburg, Jr., Trustee, 
President and principal executive officer

                 *                       
_________________________________________
J. Burchenal Ault, Trustee

                 *                       
_________________________________________
David A. Ater, Trustee

                 *                       
_________________________________________
Forrest S. Smith, Trustee

                 *                       
_________________________________________
James W. Weyhrauch, Trustee



* By:          /s/
     ___________________________________
      Charles W.N. Thompson, Jr.
      Attorney-In-Fact

<PAGE>     
                             INDEX TO EXHIBITS

Exhibit
Number    Exhibit
- -------   -------

 5        Amended and Restated Investment Advisory Agreement

 6        Thornburg Investment Trust Distribution Agreement

 9.1      Administrative Services Agreement (Class A and Class C Shares)

 9.2      Administrative Services Agreement (Class I Shares)

 9.3      Memorandum of Reimbursement

 12       Thornburg New York Intermediate Municipal Fund Statement of
          Assets and Liabilities including Schedule of Investment as
          of October 31, 1997, Statement of Operations for the period
          ending October 31, 1997, Statement of Changes in Net Assets
          for the period ending October 31, 1997, Notes to Financial
          Statements and Financial Highlights

15.1     Plan and Agreement of Distribution Pursuant to Rule 12b-1 
          (Service Plan - Classes A, C and I)

15.2     Plan and Agreement of Distribution Pursuant to Rule 12b-1
          (Distribution Plan - Class C)

<PAGE>
                               EXHIBIT 5

                               AMENDED
                            AND RESTATED
                   INVESTMENT ADVISORY AGREEMENT
                     THORNBURG INVESTMENT TRUST
             Thornburg Limited Term U.S. Government Fund
                Thornburg Limited Term Income Fund
               Thornburg Intermediate Municipal Fund
          Thornburg New Mexico Intermediate Municipal Fund
           Thornburg Florida Intermediate Municipal Fund
          Thornburg New York Intermediate Municipal Fund
                       Thornburg Value Fund
                 119 East Marcy Street, Suite 202
                    Santa Fe, New Mexico  87501



Thornburg Management Company, Inc.
119 East Marcy Street, Suite 202
Santa Fe, New Mexico  87501

Ladies and Gentlemen:

     We hereby confirm our agreement with you as follows:


     1.   We are engaged in the business of investing and reinvesting our 
assets in securities of the type, and in accordance with the limitations, 
specified in our Agreement and Declaration of Trust, By-Laws and Registration 
Statement filed with the Securities and Exchange Commission under the 
Investment Company Act of 1940 (the "Act") and the Securities Act of 1933, 
including the Prospectuses forming a part thereof (the "Registration 
Statement"), and in such manner and to such extent as may from time to time 
be authorized by our Trustees.  We have furnished copies of the documents 
listed above and will furnish you such amendments thereto as may be made from 
time to time.

     2.   (a)  We hereby employ you to manage the investment and reinvestment 
of the assets of our respective series and to perform related functions, and 
without limiting the generality of the foregoing, to provide the investment 
management services specified below.

          (b)  You will make decisions with respect to all purchases and 
sales of portfolio securities by the Trust's respective series.  To carry out 
such decisions, you are hereby authorized, as our agent and attorney in fact, 
for our account and at our risk and in our name, to place orders for the 
investment and reinvestment of our assets.  In all purchases, sales and other 
transactions in our portfolio securities you are authorized to exercise full 
discretion and act for us in the same manner and with the same force and 
effect as the Trust itself or its respective series might or could do with 
respect to such purchases, sales, or other transactions, as well as with 
respect to all other things necessary or incidental to the furtherance or 
conduct of such purchases, sales or other transactions.

          (c)  You will report to our Trustees at each meeting thereof all 
changes in our series' portfolios since your prior report, and will also keep 
us apprised of important developments affecting our portfolios and, on your 
own initiative, will furnish to us from time to time such information as you 
may believe appropriate for this purpose, whether concerning the individual 
entities whose securities are included in our portfolios, the individual 
banks and other third parties from which securities have been purchased for 
inclusion in our portfolios, the activities in which the entities or the 
banks and other third parties engage, federal income tax policies applicable 
to our investments, or the conditions prevailing in the securities markets or 
the economy generally.  You will also furnish us with such statistical and 
analytical information with respect to our portfolio securities as you may 
believe appropriate or as we reasonably may request.  In making such 
purchases and sales of our portfolio securities, you will bear in mind the 
policies set from time to time by our Trustees as well as the limitations 
imposed by our Agreement and Declaration of Trust and by the provisions of 
the Internal Revenue Code relating to regulated investment companies and the 
limitations contained in our Registration Statement.

          (d)  It is understood that you will from time to time employ or 
associate with yourself, entirely at your expense, such persons as you 
believe to be particularly fitted to assist you in the execution of your 
duties hereunder.  While this Agreement is in effect, you or persons 
affiliated with you, other than us ("your affiliates"), will provide persons 
satisfactory to our Trustees to be elected or appointed officers or employees 
of the Trust.  These shall be a president, a secretary, a treasurer, and such 
additional officers and employees as may reasonably be necessary for the 
conduct of our business.  You or your affiliates will also provide persons, 
who may be our officers, but shall not be your officers or officers of your 
affiliates, to render such clerical, accounting, and other office services to 
us as we may from time to time request of you.  Such personnel may be your 
employees or employees of your affiliates.  We will pay to you the cost of 
such personnel for rendering such services to us at such rates as shall from 
time to time be agreed upon between us, provided that all time devoted to the 
investment or reinvestment of portfolio securities shall be for your account. 
 You or your affiliates will also furnish us without charge such 
administrative and management supervision and assistance and such office 
facilities as you may believe appropriate or as we may reasonably request 
subject to the provisions of Section 3 hereof, and to the requirements of any 
regulatory authority of which you may be subject.

     3.   We agree, subject to the limitations described below, to be 
responsible for, and hereby assume the obligation for payment of, all our 
expenses other than those expressly stated to be payable by you hereunder.  
Expenses payable by us shall include, but not be limited to:  (a) brokerage 
and commission expenses, (b) federal, state or local taxes, including issue 
and transfer taxes incurred by or levied on us, (c) commitment fees, 
(d) interest charges on borrowings, (e) charges and expenses of our 
custodian, (f) charges and expenses of persons performing issuance, 
redemption, registrar, transfer and dividend disbursing functions for us, 
(g) telecommunication expenses, (h) recurring and non-recurring legal and 
accounting expenses (including disbursements), (i) insurance premiums, 
(j) costs of organizing and maintaining our existence as a business trust, 
(k) compensation and travel expenses, including Trustees' fees, of any of our 
Trustees, officers or employees who are not your officers or officers of your 
affiliates (provided that such officers who serve as our Trustees will be 
reimbursed by us for travel and out-of-pocket expenses incurred in attending 
meetings), and costs of other personnel providing services to us, (l) costs 
of shareholders' services and portfolio valuation services, (m) costs of 
shareholders' reports, proxy solicitations, distribution of prospectuses to 
existing shareholders, and meetings, (n) costs of personnel (other than your 
officers or officers of your affiliates) competent to perform administrative, 
clerical and shareholder relations functions, including travel expenses if 
necessarily related to shareholder relations functions, (o) costs of any 
reports to government agencies, (p) fees and expenses of registering our 
shares under the appropriate federal securities laws and of qualifying our 
shares under applicable state securities laws, including expenses attendant 
upon the initial registration and qualification of our shares and attendant 
upon renewals of, or amendments to, those registrations and qualifications, 
(q) expenses of printing our prospectuses, (r) the cost of printing or 
engraving of certificates representing our shares, (s) postage, 
(t) membership dues in any industry associations, (u) payment of the 
investment advisory fee provided for herein, and (v) all other charges and 
costs of our operation unless otherwise explicitly provided herein.  Our 
obligation for the foregoing expenses is limited by your agreement to be 
responsible for any amount by which our operating expenses (excluding taxes, 
brokerage, interest and, to the extent permitted by applicable law, 
extraordinary expenses) accrued for any period during which this Agreement is 
in effect exceed an amount equal to, in the case of expenses accrued with 
respect to any of our fiscal years during which this Agreement is in effect, 
the limits prescribed by any state in which the Trust's shares are qualified 
for sale.

     4.   We will expect of you, and you will give us the benefit of, your 
best judgment and efforts in rendering these services to us, and we agree as 
an inducement to your undertaking these services that you will not be liable 
hereunder for any mistake of judgment or for any other cause provided that 
nothing herein shall be deemed to protect, or purport to protect, you against 
any liability to us or to our security holders to which you would otherwise 
be subject by reason of willful misfeasance, bad faith or gross negligence in 
the performance of your duties hereunder, or by reason of your reckless 
disregard of your obligations and duties hereunder.

     5.   In consideration of the foregoing we will pay you a fee at the 
annual percentage rate of the daily average of the net assets of each series 
to which this Agreement is applicable, as set forth below:

Thornburg Limited Term
U.S. Government Fund  
- ----------------------
          Net Assets of Fund               Rate
          ------------------               ----
          0 to $1 billion                 .375%
          $1 billion to $2 billion        .325%
          Over $2 billion                 .275%

Thornburg Limited Term Income Fund;
Thornburg Intermediate Municipal Fund;
Thornburg New Mexico Intermediate Municipal Fund;
Thornburg Florida Intermediate Municipal Fund;
Thornburg New York Intermediate Municipal Fund
- -------------------------------------------------
          Net Assets of Fund                 Rate
          ------------------                 ----
          0 to $500 million                  .50%
          $500 million to $1 billion         .45%
          $1 billion to $1.5 billion         .40%
          $1.5 billion to 2 billion          .35%
          Over $2 billion                   .275%

Thornburg Value Fund
- --------------------
          Net Assets of Fund                 Rate
          ------------------                 ----
          0 to $500 million                 .875%
          $500 million to $1 billion        .825%
          $1 billion to $1.5 billion        .775%
          $1.5 billion to 2 billion         .725%
          Over $2 billion                   .675%

Your fee will be accrued by us daily and will be payable in arrears on the 
last day of each calendar month for services performed hereunder during that 
month, together with any applicable gross receipts tax, sales tax, 
compensating tax, value added tax or similar exaction imposed by any federal, 
state or local government, but the taxes on the fee will be limited to 10% of 
the fee.  Any reimbursement of our expenses, to which we may become entitled 
pursuant to Paragraph 3, will be paid to us at the end of the month for which 
those expenses are accrued, at the same time as we pay you your fee for that 
month.

     6.   This Agreement is a continuation of an existing agreement as to 
Thornburg Limited Term U.S. Government Fund, Thornburg Limited Term Income 
Fund, Thornburg Intermediate Municipal Fund, Thornburg New Mexico 
Intermediate Municipal Fund, Thornburg Florida Intermediate Municipal Fund 
and Thornburg Value Fund dated July 1, 1996 and continued for an additional 
term to November 1, 1997 by action of the Trustees.  This Agreement becomes 
effective as to Thornburg New York Intermediate Municipal Fund on the date 
hereof, and continues in effect for one year.  This Agreement may be 
continued as to any one or more series, for successive twelve-month periods, 
provided that such continuation is specifically approved at least annually by 
our Trustees or by a majority vote of the holders of our outstanding voting 
securities (as defined in the Act) and, in either case, by a majority of 
those of our Trustees who are neither a party to this Agreement nor, other 
than by their service as Trustees of the Trust, interested persons, as 
defined in the Act, of any such person who is party to this Agreement.  Upon 
the effectiveness of this Agreement, it shall supersede all previous 
agreements between us covering the subject matter hereof.  This Agreement may 
be terminated at any time as to any series, without the payment of any 
penalty, by vote of a majority of the outstanding voting securities of that 
series, as defined in the Act, or by a vote of a majority of our Trustees, on 
sixty days' written notice to you, or by you on sixty days' written notice to 
us.

     7.   This Agreement may not be transferred, assigned, sold or in any 
manner hypothecated or pledged by you and this Agreement shall terminate 
automatically in the event of any such transfer, assignment, sale, 
hypothecation or pledge by you.  The terms "transfer," "assignment" and 
"sale" as used in this paragraph shall have the meanings ascribed thereto by 
governing law and in applicable rules or regulations of the Securities and 
Exchange Commission.

     8.   Except to the extent necessary to perform your obligations 
hereunder, nothing herein shall be deemed to limit or restrict your right, or 
the right of any of your officers, directors or employees who may also be a 
Trustee, officer or employee of ours, or of a person affiliated with us, as 
defined in the Act, to engage in any other business or to devote time and 
attention to the management or other aspects of any other business, whether 
of a similar or dissimilar nature, or to render services of any kind to any 
other corporation, firm, individual or association.

     9.  This Agreement applies to the series of the Trust specified herein. 
 This Agreement may by agreement be made applicable to one or more other 
series.  This Agreement will in all events apply separately to each series to 
which it relates and will be severable in all respects.  Consequently, this 
Agreement may be modified, continued or terminated as to any series without 
affecting any other series.  A determination by any court or agency having 
jurisdiction that any provision of this Agreement is invalid or unenforceable 
will not affect the validity of the other provisions of this Agreement. 

     If the foregoing is in accordance with your understanding, you will 
kindly so indicate by signing and returning to us the enclosed copy hereof.


                                  Very truly yours,

                                  THORNBURG INVESTMENT TRUST


                                  By:_____________________________________


ACCEPTED:  June 6, 1997

THORNBURG MANAGEMENT COMPANY, INC.


By:_______________________________


<PAGE>
                               EXHIBIT 6

                     THORNBURG INVESTMENT TRUST
                      DISTRIBUTION AGREEMENT


     THIS AGREEMENT is made as of the 1st day of November, 1997, between 
Thornburg Investment Trust, a Massachusetts business trust the "Trust"), in 
respect of its respective series (collectively, the "Funds," and 
individually, the "Fund"), and Thornburg Securities Corporation, a Delaware 
corporation (the "Distributor").

                             RECITALS

     1.   The Trust is registered under the Investment Company Act of 1940, 
as amended (the "1940 Act"), as a diversified open-end management investment 
company and it is in the interest of the Trust to offer shares in the Funds 
for sale continuously.

     2.   The Trust previously has entered into distribution agreements with 
Thornburg respecting sales of shares issued by Thornburg Limited Term U.S. 
Government Fund, Thornburg Limited Term Income Fund, Thornburg Intermediate 
Municipal Fund, Thornburg New Mexico Intermediate Municipal Fund, Thornburg 
Florida Intermediate Municipal Fund, Thornburg New York Intermediate 
Municipal Fund and Thornburg Value Fund.  The parties seek to combine those 
agreements into this one instrument for their mutual convenience.

     3.   The Trust and the Distributor seek to enter into this Agreement 
relating to the continuous offering of the Funds' shares of beneficial 
interest (the "Shares") registered by the registration statement filed with 
respect to the Fund pursuant to the Securities Act of 1933 (the "Act") and 
the 1940 Act.  This Agreement may be made applicable to one or more 
additional Funds by the parties' execution of one or more supplements to this 
Agreement.

                             AGREEMENT

     NOW, THEREFORE, the parties agree as follows:

Section 1.  Appointment of the Distributor.
- ---------   ------------------------------
     (a)  The Trust hereby appoints the Distributor as its exclusive agent to 
sell and to arrange for the sale of the Shares on the terms and for the 
period set forth in this Agreement, and Distributor hereby accepts such 
appointment and agrees to act hereunder.

     (b)  The exclusive rights granted to the Distributor to sell the Shares 
shall not apply to Shares issued by any Fund (i) in connection with the 
merger or consolidation with the Fund of any other investment company or 
personal holding company or the acquisition by purchase or otherwise of all 
(or substantially all) the assets or the outstanding shares of any such 
company by the Fund or (ii) pursuant to reinvestment by shareholders of the 
Fund of dividends or capital gains distributions or (iii) pursuant to any 
sale by the Trust of Shares at Net Asset Value (as defined below).

Section 2.  Services and Duties of the Distributor.
- ---------   --------------------------------------
     (a)  The Distributor agrees to sell, as agent for the Trust, from time 
to time during the term of this Agreement, Shares of the Funds upon the terms 
described in the Prospectus and in the Statement of Additional Information.  
As used in this Agreement, the terms "Prospectus" and "Statement of 
Additional Information" shall mean the prospectuses or the statements of 
additional information, as the case may be, included as part of the Funds' 
Registration Statement, as most recently filed from time to time with the 
Securities and Exchange Commission and effective under the 1933 Act and the 
1940 Act.

     (b)  Upon commencement of each Fund's operations, the Distributor will 
hold itself available to receive orders, satisfactory to the Distributor, for 
the purchase of Shares of the Fund and will accept such orders on behalf of 
the Trust as of the time of receipt of such orders and will transmit such 
orders as are so accepted to the Trust's transfer and dividend disbursing 
agent as promptly as practicable.  Purchase orders shall be deemed effective 
at the time and in the manner set forth in the Prospectus and in the 
Statement of Additional Information.

     (c)  The Distributor in its discretion may sell Shares to such 
registered and qualified retail dealers as it may select, in accordance with 
Section 5 hereof.

     (d)  The offering price of Shares shall be the net asset value (as 
defined in the Declaration of Trust of the Trust and determined as set forth 
in the Prospectus and in the Statement of Additional Information) per Share 
next determined following receipt of an order ("Net Asset Value"), plus the 
applicable sales charge, if any, determined as set forth in the Prospectus.  
The Trust shall furnish the Distributor, with all possible promptness, an 
advice of each computation of Net Asset Value.

     (e)  The Distributor shall not be obligated to sell any certain number 
of Shares and nothing herein contained shall prevent the Distributor from 
entering into like distribution arrangements with other investment companies 
so long as the performance of its obligations hereunder is not impaired 
thereby.

Section 3.  Compensation of the Distributor.
- ---------   -------------------------------
     The above-mentioned sales charge shall constitute the entire 
compensation of the Distributor.  Out of such sales charge, the Distributor 
may allow such concessions or reallowances to Selected Dealers as are set 
forth in the Prospectus or as it may from time to time determine.  The 
Distributor also shall be entitled to receive as compensation hereunder any 
contingent deferred sales charge imposed upon the redemption of Fund shares.

Section 4.  Duties of the Trust.
- ---------   -------------------
     (a)  The Trust agrees to sell its Shares so long as it has Shares 
available for sale; and to deliver certificates for, or cause the Trust's 
transfer agent to issue non-negotiable share deposit receipts evidencing, 
such Shares registered in such names and amounts as the Distributor has 
requested in writing, as promptly as practicable after receipt by the Trust 
of the Net Asset Value thereof and written request of the Distributor 
therefor.

     (b)  The Trust shall keep the Distributor fully informed with regard to 
its affairs and shall furnish to the Distributor copies of all information, 
financial statements and other papers which the Distributor may reasonably 
request for use in connection with the distribution of Shares of the Funds, 
and this shall include one certified copy, upon request by the Distributor, 
of all financial statements prepared for the Funds by independent accountants 
and such reasonable number of copies of its most current Prospectus and 
Statement of Additional Information and annual and interim reports as the 
Distributor may request and shall cooperate fully in the efforts of the 
Distributor to sell and arrange for the sale of the Funds' Shares and in the 
performance of the Distributor under this Agreement.

     (c)  The Trust shall take, from time to time, all necessary action to 
fix the number of authorized Shares and such steps, including payment of the 
related filing fee, as may be necessary to register the same under the 1933 
Act to the end that there will be available for sale such number of Shares as 
the Distributor may be expected to sell.  The Trust agrees to file from time 
to time such amendments, reports and other documents as may be necessary in 
order that there shall be no untrue statement of a material fact and no 
omission to state a material fact in the Registration Statement, Prospectus 
or Statement of Additional Information which omission would make the 
statement therein misleading.

     (d)  The Trust shall use its best efforts to qualify and maintain the 
qualification of an appropriate number of Shares for sale under the 
securities laws of such jurisdictions as the Distributor and the Trust may 
approve, and, if necessary or appropriate in connection therewith, to qualify 
and maintain the qualification of the Trust as a broker or dealer in such 
states; provided that the Trust shall not be required to amend its 
Declaration of Trust or By-Laws to comply with the laws of any state, to 
maintain an office in any state, to change the terms of the offering of 
Shares in any state from the terms set forth in its Registration Statement, 
Prospectus and Statement of Additional Information, to qualify as a foreign 
corporation in any state or to consent to service of process in any state 
other than with respect to claims arising out of the offering of Shares.  The 
Distributor shall furnish such information and other material relating to its 
affairs and activities as may be required by the Trust in connection with 
such qualifications.

Section 5.  Selected Dealers' Agreements.
- ---------   ----------------------------
     (a)  The Distributor shall have the right to enter into selected 
dealers' agreements with securities dealers of its choice ("Selected 
Dealers") for the sale of Shares and to fix therein the portion of the sales 
charge that may be allocated to the Selected Dealers.  In making agreements 
with Selected Dealers, the Distributor shall act as agent for the Trust.  
Shares sold to Selected Dealers shall be for resale by such dealers only at 
Net Asset Value, plus the applicable sales charge as set forth in the 
Prospectus.

     (b)  Within the United States, the Distributor shall offer and sell 
Shares only to such Selected Dealers as are members in good standing of the 
National Association of Securities Dealers, Inc. (the "NASD").

Section 6.  Expenses.
- ---------   --------
     (a)  The Trust, on behalf of the Funds, shall bear all costs and 
expenses of the continuous offering of its Shares in connection with (i) fees 
and disbursements of its counsel and independent accountants, (ii) the 
preparation, filing and printing (including typesetting) of any registration 
statements, statements of additional information and prospectuses required by 
and under the federal securities laws, (iii) the preparation and mailing of 
annual and interim reports, statements of additional information, 
prospectuses and proxy materials to its then current shareholders and to 
government agencies, and (iv) the qualification of Shares for sale and of the 
Trust as a broker or dealer under the securities laws of such states or other 
jurisdictions as shall be selected by the Trust and the Distributor pursuant 
to Section 4(d) hereof and the costs and expenses payable to each state for 
continuing such qualification therein.

     (b)  The Distributor shall bear (i) the costs and expenses of preparing, 
printing and distributing any materials not prepared by the Trust and other 
materials used by the Distributor in connection with its offering of Shares 
for sale to the public, including the additional cost of printing copies of 
the Prospectus and the Statement of Additional Information and of annual and 
interim reports to shareholders other than copies thereof required for 
distribution to then current shareholders or for filing with any federal 
securities authorities, (ii) any expenses of advertising incurred by the 
Distributor in connection with such offering and (iii) the expenses of 
registration or qualification of the Distributor as a broker or dealer under 
federal or state laws and the expenses of continuing such registration or 
qualification.

Section 7.  Indemnification.
- ---------   ---------------
     The Trust agrees to indemnify, defend and hold the Distributor, its 
officers and directors and any other persons who control the Distributor 
within the meaning of Section 15 of the 1933 Act, free and harmless from and 
against any and all claims, demands, liabilities and expenses (including the 
cost of investigation or defending such claims, demands or liabilities and 
any counsel fees incurred in connection therewith) which the Distributor, its 
officers, directors or any such controlling person may incur under the 1933 
Act, or any common law or otherwise, arising out of or based upon any alleged 
untrue statement of a material fact contained in the Registration Statement 
or Prospectus or the annual or interim reports to any Fund's shareholders, or 
arising out of or based upon any alleged omission to state a material fact 
required to be stated therein, or necessary to make the statements therein 
not misleading, except insofar as such claims, demands, liabilities or 
expenses arise out of or are based upon any such untrue statement or omission 
made in reliance upon and in conformity with information furnished in writing 
by the Distributor to the Trust for use in the Registration Statement, 
Prospectus or in any such report; provided, however, that this indemnity 
agreement, to the extent that it might require indemnity of any person who is 
also an officer or director of the Trust or who controls the Trust within the 
meaning of Section 15 of the 1933 Act, shall not inure to the benefit of such 
officer, director or controlling person unless a court of competent 
jurisdiction shall determine, or it shall have been determined by controlling 
precedent, that such result would not be against public policy as expressed 
in the 1933 Act; and further provided that in no event shall anything 
contained herein be so construed as to protect the Distributor against any 
liability to the Trust or to its security holders to which the Distributor 
would otherwise be subject by reason of willful  misfeasance, bad faith, or 
gross negligence in the performance of its duties, or by reason of its 
reckless performance of its duties, or by reason of its reckless disregard of 
its obligations and duties under this Agreement.  The Trust's agreement to 
indemnify the Distributor, its officers or directors, or any such controlling 
person, is expressly conditioned upon the Trust's being promptly notified of 
any claim or action, such notification to be given by letter or telegram 
addressed to the Trust at the address set forth in Section 10 hereof.  The 
Trust agrees promptly to notify the Distributor of the commencement of any 
litigation or proceedings against it or any of its officers or directors in 
connection with the issue and sale of any of the Shares.  The obligations of 
the Trust hereunder shall be payable only from the assets of the Funds.

     The Distributor agrees to indemnify, defend and hold the Trust and each 
of its trustees and officers and any person, if any, who controls the Trust 
within the meaning of Section 15 of the 1933 Act free and harmless from and 
against any and all claims, demands, liabilities and expenses (including the 
cost of investigation or defending against such claims, demands or 
liabilities and any counsel fees incurred in connection therewith) which the 
Trust and each of its trustees and officers and any such controlling person 
may incur under the 1933 Act or under common law or otherwise, but only to 
the extent that such liability or expense incurred by the Trust, any of its 
trustees or officers, or any such controlling person resulting from such 
claims or demands shall arise out of or be based upon any alleged untrue 
statement of a material fact contained in information furnished in writing by 
the Distributor to the Trust for use in the Registration Statement, 
Prospectus or annual or interim reports to shareholders or shall arise out of 
or be based upon any alleged omission to state a material fact in connection 
with such information required to be stated in the Registration Statement, 
Prospectus or reports to shareholders or necessary to make such information 
not misleading.  The Distributor's agreement to indemnify the Trust and its 
trustees and officers, and any such controlling person, is expressly 
conditioned upon the Distributor's being promptly notified of any action 
brought against the Trust, its officers or directors or any such controlling 
person, such notification to be given to the Distributor at the address set 
forth in Section 10 hereof.

Section 8.  Compliance with Securities Laws.
- ---------   -------------------------------
     The Trust represents that it is registered as an open-end investment 
company under the 1940 Act, and agrees that it will comply with all of the 
provisions of the 1940 Act and of the rules and regulations thereunder.  The 
Trust and the Distributor each agree to comply with all of the applicable 
terms and provisions of the 1940 Act, the 1933 Act and, subject to the 
provisions of Section 4(d), all applicable state securities or "Blue Sky" 
laws.  The Distributor agrees to comply with all of the applicable terms and 
provisions of the Securities Exchange Act of 1934.

Section 9.  Term of Agreement; Termination.
- ---------   ------------------------------
     This Agreement shall commence as to the Funds identified in the second 
Recital on the first date set forth above.  This Agreement shall continue in 
effect for a period more than one year only so long as such continuance is 
specifically approved at least annually in conformity with the requirements 
of the 1940 Act.  This Agreement will become effective immediately as to 
other Funds upon execution of a supplement to this Agreement after approval 
by the Trustees of the supplement in accordance with the 1940 Act and the 
rules thereunder. 

     This Agreement shall terminate automatically in the event of its 
assignment (as defined in the 1940 Act).  In addition, this Agreement may be 
terminated by either party at any time, without penalty, on no less than six 
months' written notice to the other party.

Section 10.  Notices.
- ----------   -------
     Any notice required to be given pursuant to this Agreement shall be 
deemed duly given if delivered or mailed by registered mail, postage prepaid, 
(1) to the Distributor at 119 East Marcy Street, Suite 202, Santa Fe, New 
Mexico 87501, Attention: President, or (2) to the Trust at 119 East Marcy 
Street, Suite 202, Santa Fe, New Mexico 87501.

Section 11.  Amendments.
- ----------   ----------
     This Agreement may be amended by the parties only if such amendment is 
in writing and signed by both parties and is approved by (i) the trustees of 
the Trust, or by the vote of a majority of the outstanding voting securities 
of the Trust (as defined in the 1940 Act), and (ii) a majority of the 
trustees who are not parties to this Agreement or interested persons (as 
defined in the 1940 Act) of any such party (other than solely by reason of 
being a trustee of the Trust) cast in person at a meeting called for the 
purpose of voting on such approval.

Section 12.  Governing Law.
- ----------   -------------
     This Agreement shall be governed and construed in accordance with the 
substantive laws of the State of New Mexico and the applicable provisions of 
the 1940 Act.

Section 13.  Limitation of Liability.
- ----------   -----------------------
     The Trustees have authorized the execution of this Agreement in their 
capacity as Trustees and not individually and Thornburg agrees that neither 
shareholders of any Fund nor the Trustees, nor any officer, employee, 
representative or agent of the Trust shall be personally liable upon, nor 
shall resort be had to their private property for the satisfaction of, 
obligations given, executed or delivered on behalf of or by the Trust, that 
the shareholders of every Fund, Trustees, officers, employees, 
representatives and agents of the Trust shall not be personally liable 
hereunder, and that it shall look solely to the property of the Funds for the 
satisfaction of any claim hereunder.

     IN WITNESS WHEREOF, the parties hereto have executed this Agreement as 
of the day and year first above written.

                                  THORNBURG INVESTMENT TRUST

                                  By_________________________________

                                  THORNBURG SECURITIES CORPORATION

                                  By_________________________________


<PAGE>
                               EXHIBIT 9.1

                ADMINISTRATIVE SERVICES AGREEMENT
                   (Class A and Class C Shares)

     THIS AGREEMENT is made as of the 1st day of November, 1997 by and 
between THORNBURG INVESTMENT TRUST, a Massachusetts business trust (the 
"Trust"), in respect of Class A and Class C shares of its respective series 
(hereinafter designated collectively, the "Funds," and individually, a 
"Fund"), and THORNBURG MANAGEMENT COMPANY, INC., a Delaware corporation 
("Thornburg").

                             Recitals

     1.   The Trust engages in business as an open-end management investment 
company and is registered under the Investment Company Act of 1940, as 
amended (the "1940 Act").

     2.   The Trust previously entered into Administrative Services 
Agreements respecting the Class A shares of Thornburg Limited Term U.S. 
Government Fund, Thornburg Limited Term Income Fund, Thornburg Intermediate 
Municipal Fund, Thornburg New Mexico Intermediate Municipal Fund, Thornburg 
Florida Intermediate Municipal Fund, Thornburg New York Intermediate 
Municipal Fund and Thornburg Value Fund, and entered into Administrative 
Services Agreements respecting the Class C shares of Thornburg Limited Term 
U.S. Government Fund, Thornburg Limited Term Income Fund, Thornburg 
Intermediate Municipal Fund and Thornburg Value Fund.  The parties seek to 
combine those agreements into one instrument for their mutual convenience.

     3.   The Trust seeks to obtain described administrative services from 
Thornburg for the Class A and Class C shares of each Fund.  Thornburg seeks 
to be retained to perform services in accordance with this Agreement.

     4.   This Agreement has been approved by a vote of the Trustees of the 
Trust, including a majority of the Trustees who are not interested persons of 
the Trust, as defined in the 1940 Act, and who have no direct or indirect 
financial interest in the operation of this Agreement (sometimes the 
"Disinterested Trustees"), cast in person at a meeting called for the purpose 
of voting on this Agreement.

     5.   This Agreement may be made applicable to one or more additional 
classes of shares and Funds by the parties' execution of one or more 
supplements to this Agreement.

                             Agreement

     NOW THEREFORE, the Trust hereby enters into this Agreement with 
Thornburg, and the parties provide and agree as follows:

      1.   Subject to the continuing supervision of the Trustees, the Trust 
hereby retains and appoints Thornburg as its agent to perform certain 
administrative services and engage in activities beyond those specifically 
required by the investment advisory agreement between the Trust and 
Thornburg, and to provide related services.  The activities and services to 
be provided by Thornburg hereunder shall include supervision and direction of 
shareholder communications, assistance and review in preparation of reports 
and other communications to shareholders, administration of shareholder 
assistance, supervision and review of bookkeeping, clerical, shareholder and 
account administration and accounting functions, supervision or conduct of 
related regulatory compliance and legal affairs, and review and 
administration of functions delivered by outside service providers to or for 
the shareholders of the class or classes served under this Agreement, and 
such other related or similar administrative functions as the Trust and 
Thornburg may from time to time agree.  Thornburg or its affiliates will also 
provide persons who shall not be Thornburg's officers or officers of 
Thornburg's affiliates, to render such shareholder-related and other related 
office services to the Trust as the Trust may from time to time request of 
Thornburg.  These personnel may be employees of Thornburg or its affiliates.

     2.   The Trust will pay monthly for the services described in the 
preceding Paragraph 1, a fee computed at an annual rate of .125 of 1% of the 
average daily net assets attributable to each class of shares to which this 
Agreement applies from time to time, together with any applicable gross 
receipts tax, sales tax, value-added tax, compensating tax or similar 
exaction imposed by any federal, state or local government, but the aggregate 
of those taxes will not exceed 10% of the basic fee.  In addition, the Trust 
will pay Thornburg for the cost of personnel provided in accordance with the 
preceding Paragraph 1 to provide the described shareholder-related and office 
services requested by the Trust.  Thornburg and the Trust agree and 
acknowledge that the Trust will pay expenses payable by the Trust in 
accordance with Paragraph 3 of the investment advisory agreement between the 
Trust and Thornburg.

     3.   The Trust and Thornburg shall provide to the Trust's Trustees, at 
least quarterly, a written report of all amounts expended by the Trust 
pursuant to this Agreement.  Each report will itemize the types of expenses 
incurred for which payment is being made and the purposes and the amounts of 
the expenses.  Thornburg shall provide to the Trustees upon request such 
information as may reasonably be required for the Trustees to review the 
continuing appropriateness of this Agreement.

     4.   This Agreement is effective as of the date first set forth above 
for the classes of shares of the Funds identified in the second Recital.  The 
Agreement will become effective immediately as to other classes of shares or 
Funds upon execution of a supplement to this Agreement after approval by the 
Trustees and any shareholder approvals then required by the 1940 Act or the 
rules thereunder.  This Agreement thereafter will continue in effect from 
year to year, provided that continuance is approved at least annually by a 
vote of the Trustees, including a majority of the Disinterested Trustees, 
cast in person at a meeting called for the purpose of voting on the 
continuance.  This Agreement may be terminated as to a class of shares of a 
Fund at any time, without penalty, by the vote of a majority of the 
Disinterested Trustees or by the vote of a majority of the outstanding shares 
of the class.  The Trust may discontinue Thornburg's services as to a class 
under this Agreement and name another service provider, or Thornburg may 
assign this Agreement or delegate part or all of its obligations hereunder 
(to a related or unrelated entity) upon a vote of the Trustees including a 
majority of the Disinterested Trustees or a vote of the holders of a majority 
of the class's outstanding shares, without any penalty.  Thornburg may 
terminate its services under this Agreement upon 60 days written notice to 
the Trust.

     5.   All material amendments to this Agreement must be approved by the 
vote of the Trustees, including a majority of the Disinterested Trustees, 
cast in person at a meeting called for the purpose of voting on the 
amendment. 

     6.   This Agreement applies to Class A and Class C shares of the Funds 
of the Trust specified in the second Recital to this Agreement.  The parties 
acknowledge and agree that this Agreement may from time to time be made 
applicable to one or more funds and one or more classes of shares of those 
funds, but that the Agreement applies separately to each class of shares and 
is severable in all respects. Consequently, the Agreement may be modified, 
continued or terminated as to one class of shares of a fund without affecting 
any other class of shares of any other fund.

     7.   The Trust will preserve in an easily accessible place copies of 
this Agreement and all reports made pursuant to this Agreement, together with 
minutes of all Trustees' meetings at which the adoption, amendment or 
continuance of this Agreement were considered (describing the factors 
considered and the basis for decision), for a period of not less than 6 years 
from the date of this Agreement.

     8.   This Agreement will be construed in accordance with the laws of the 
State of New Mexico and applicable provisions of the 1940 Act.  To the extent 
the applicable law of the State of New Mexico or any provisions herein 
conflict with the applicable provisions of the 1940 Act, the latter will 
control.  If any provision of this Agreement is determined by a court or 
governmental agency having jurisdiction to be invalid or unenforceable, the 
balance of this Agreement shall remain in full force and effect.  

     9.   The Trust will not hold TMC liable for any act or failure to act 
hereunder in the absence of TMC's willful misfeasance, bad faith or gross 
negligence, or its reckless disregard of its obligations hereunder.

     10.  The Trustees have authorized the execution of this Agreement in 
their capacity as Trustees and not individually and Thornburg agrees that 
neither shareholders of any Fund nor the Trustees, nor any officer, employee, 
representative or agent of the Trust shall be personally liable upon, nor 
shall resort be had to their private property for the satisfaction of, 
obligations given, executed or delivered on behalf of or by the Trust, that 
the shareholders of every Fund, Trustees, officers, employees, 
representatives and agents of the Trust shall not be personally liable 
hereunder, and that it shall look solely to the property of the Funds for the 
satisfaction of any claim hereunder.

     IN WITNESS WHEREOF, the parties hereto have executed and delivered this 
Agreement on the day and year first above written in Santa Fe, New Mexico.

                                  THORNBURG INVESTMENT TRUST

                                   By:____________________________________


                                  THORNBURG MANAGEMENT COMPANY, INC.

                                  By:_____________________________________


<PAGE>
                               EXHIBIT 9.2

                 ADMINISTRATIVE SERVICES AGREEMENT
                         (Class I Shares)

     THIS AGREEMENT is made as of the 1st day of November, 1997 by and 
between THORNBURG INVESTMENT TRUST, a Massachusetts business trust (the 
"Trust"), in respect of Class I shares of its respective series (hereinafter 
designated collectively, the "Funds," and individually, a "Fund"), and 
THORNBURG MANAGEMENT COMPANY, INC., a Delaware corporation ("Thornburg").

                             Recitals

     1.   The Trust engages in business as an open-end management investment 
company and is registered under the Investment Company Act of 1940, as 
amended (the "1940 Act").

     2.   The Trust previously entered into Administrative Services 
Agreements respecting the Class I shares of Thornburg Limited Term U.S. 
Government Fund, Thornburg Limited Term Income Fund and Thornburg 
Intermediate Municipal Fund.  The parties seek to combine those agreements 
into one instrument for their mutual convenience.

     3.   The Trust seeks to obtain described administrative services from 
Thornburg for the Class I shares of each Fund.  Thornburg seeks to be 
retained to perform services in accordance with this Agreement.

     4.   This Agreement has been approved by a vote of the Trustees of the 
Trust, including a majority of the Trustees who are not interested persons of 
the Trust, as defined in the 1940 Act, and who have no direct or indirect 
financial interest in the operation of this Agreement (sometimes the 
"Disinterested Trustees"), cast in person at a meeting called for the purpose 
of voting on this Agreement.

     5.   This Agreement may be made applicable to one or more additional 
classes of shares and Funds by the parties' execution of one or more 
supplements to this Agreement.

                            Agreement

     NOW THEREFORE, the Trust hereby enters into this Agreement with 
Thornburg, and the parties provide and agree as follows:


     1.   Subject to the continuing supervision of the Trustees, the Trust 
hereby retains and appoints Thornburg as its agent to perform certain 
administrative services and engage in activities beyond those specifically 
required by the investment advisory agreement between the Trust and 
Thornburg, and to provide related services.  The activities and services to 
be provided by Thornburg hereunder shall include supervision and direction of 
shareholder communications, assistance and review in preparation of reports 
and other communications to shareholders, administration of shareholder 
assistance, supervision and review of bookkeeping, clerical, shareholder and 
account administration and accounting functions, supervision or conduct of 
related regulatory compliance and legal affairs, and review and 
administration of functions delivered by outside service providers to or for 
the shareholders of the class or classes served under this Agreement, and 
such other related or similar administrative functions as the Trust and 
Thornburg may from time to time agree.  Thornburg or its affiliates will also 
provide persons who shall not be Thornburg's officers or officers of 
Thornburg's affiliates, to render such shareholder-related and other related 
office services to the Trust as the Trust may from time to time request of 
Thornburg.  These personnel may be employees of Thornburg or its affiliates.


     2.   The Trust will pay monthly for the services described in the 
preceding Paragraph 1, a fee computed at an annual rate of .05 of 1% of the 
average daily net assets attributable to each class of shares to which this 
Agreement applies from time to time, together with any applicable gross 
receipts tax, sales tax, value-added tax, compensating tax or similar 
exaction imposed by any federal, state or local government, but the aggregate 
of those taxes will not exceed 10% of the basic fee.  In addition, the Trust 
will pay Thornburg for the cost of personnel provided in accordance with the 
preceding Paragraph 1 to provide the described shareholder-related and office 
services requested by the Trust.  Thornburg and the Trust agree and 
acknowledge that the Trust will pay expenses payable by the Trust in 
accordance with Paragraph 3 of the investment advisory agreement between the 
Trust and Thornburg.

     3.   The Trust and Thornburg shall provide to the Trust's Trustees, at 
least quarterly, a written report of all amounts expended by the Trust 
pursuant to this Agreement.  Each report will itemize the types of expenses 
incurred for which payment is being made and the purposes and the amounts of 
the expenses.  Thornburg shall provide to the Trustees upon request such 
information as may reasonably be required for the Trustees to review the 
continuing appropriateness of this Agreement.

     4.   This Agreement is effective as of the date first set forth above 
for the classes of shares of the Funds identified in the second Recital.  The 
Agreement will become effective immediately as to other classes of shares or 
Funds upon execution of a supplement to this Agreement after approval by the 
Trustees and any shareholder approvals then required by the 1940 Act or the 
rules thereunder.  This Agreement thereafter will continue in effect from 
year to year, provided that continuance is approved at least annually by a 
vote of the Trustees, including a majority of the Disinterested Trustees, 
cast in person at a meeting called for the purpose of voting on the 
continuance.  This Agreement may be terminated as to a class of shares of a 
Fund at any time, without penalty, by the vote of a majority of the 
Disinterested Trustees or by the vote of a majority of the outstanding shares 
of the class.  The Trust may discontinue Thornburg's services as to a class 
under this Agreement and name another service provider, or Thornburg may 
assign this Agreement or delegate part or all of its obligations hereunder 
(to a related or unrelated entity) upon a vote of the Trustees including a 
majority of the Disinterested Trustees or a vote of the holders of a majority 
of the class's outstanding shares, without any penalty.  Thornburg may 
terminate its services under this Agreement upon 60 days written notice to 
the Trust.

     5.   All material amendments to this Agreement must be approved by the 
vote of the Trustees, including a majority of the Disinterested Trustees, 
cast in person at a meeting called for the purpose of voting on the 
amendment. 

     6.   This Agreement applies to Class I shares of the Funds of the Trust 
specified in the second Recital to this Agreement.  The parties acknowledge 
and agree that this Agreement may from time to time be made applicable to one 
or more funds and one or more classes of shares of those funds, but that the 
Agreement applies separately to each class of shares and is severable in all 
respects. Consequently, the Agreement may be modified, continued or 
terminated as to one class of shares of a fund without affecting any other 
class of shares of any other fund.

     7.   The Trust will preserve in an easily accessible place copies of 
this Agreement and all reports made pursuant to this Agreement, together with 
minutes of all Trustees' meetings at which the adoption, amendment or 
continuance of this Agreement were considered (describing the factors 
considered and the basis for decision), for a period of not less than 6 years 
from the date of this Agreement.

     8.   This Agreement will be construed in accordance with the laws of the 
State of New Mexico and applicable provisions of the 1940 Act.  To the extent 
the applicable law of the State of New Mexico or any provisions herein 
conflict with the applicable provisions of the 1940 Act, the latter will 
control.  If any provision of this Agreement is determined by a court or 
governmental agency having jurisdiction to be invalid or unenforceable, the 
balance of this Agreement shall remain in full force and effect.  

     9.   The Trust will not hold TMC liable for any act or failure to act 
hereunder in the absence of TMC's willful misfeasance, bad faith or gross 
negligence, or its reckless disregard of its obligations hereunder.

     10.  The Trustees have authorized the execution of this Agreement in 
their capacity as Trustees and not individually and Thornburg agrees that 
neither shareholders of any Fund nor the Trustees, nor any officer, employee, 
representative or agent of the Trust shall be personally liable upon, nor 
shall resort be had to their private property for the satisfaction of, 
obligations given, executed or delivered on behalf of or by the Trust, that 
the shareholders of every Fund, Trustees, officers, employees, 
representatives and agents of the Trust shall not be personally liable 
hereunder, and that it shall look solely to the property of the Funds for the 
satisfaction of any claim hereunder.

     IN WITNESS WHEREOF, the parties hereto have executed and delivered this 
Agreement on the day and year first above written in Santa Fe, New Mexico.

                                  THORNBURG INVESTMENT TRUST

                                   By:____________________________________


                                  THORNBURG MANAGEMENT COMPANY, INC.

                                  By:_____________________________________


<PAGE>
                               EXHIBIT 9.3

                              REVISED
                            MEMORANDUM
                                OF
                           REIMBURSEMENT


     THIS REVISED MEMORANDUM OF REIMBURSEMENT is made as of June 20, 1996 by 
and between THORNBURG INVESTMENT TRUST, a Massachusetts business trust, in 
respect of its series (the "Company"), and THORNBURG MANAGEMENT COMPANY, 
INC., a Delaware corporation ("TMC"), to memorialize certain understandings 
respecting the Company's reimbursement to TMC for certain costs incurred by 
TMC on the Company's behalf.

     1.   The Company is an investment company registered under the 
Investment Company Act of 1940 (the "1940 Act").  TMC is its investment 
adviser pursuant to an Investment Advisory Agreement entered into and 
continued in accordance with the 1940 Act.

     2.   The Company and TMC have agreed that TMC will perform for the 
Company certain telephone answering services previously performed by the 
Company's transfer agent, National Financial Data Services, Inc. ("NFDS").  
These telephone services include answering telephone calls placed to the 
Company or its transfer agent by shareholders, securities dealers and others 
through the Company's toll free number, and responding to those telephone 
calls by answering questions, effecting certain shareholder transactions 
described in the Company's then current prospectuses, and performing such 
other, similar functions as the Company may reasonably prescribe from time to 
time.  The Company will pay one dollar for each telephone call, which was the 
charge previously imposed by the Company's transfer agent for this service.  
The Company's transfer agent will no longer charge for this service.

     3.   The Company and TMC have agreed that TMC will purchase equipment 
necessary for TMC's telephone representatives to obtain access to customer 
account information (including facsimiles of customer applications, 
correspondence and other documents) from data maintained by the Company's 
transfer agent, including monitors, keyboards, telephone equipment, and 
related property.  The Company will reimburse TMC for purchasing this 
equipment by paying to TMC during each year of the continuation of this 
arrangement the depreciation attributable to the equipment for the year, 
based upon the depreciation schedule employed by TMC in preparing its books. 
 The Company and TMC understand that the equipment also will be used by TMC 
to furnish telephone answering services to Thornburg Limited Term Municipal 
Fund, Inc., and that the depreciation attributable to the equipment will be 
allocated between the Company and Thornburg Limited Term Municipal Fund, Inc. 
based upon their relative net assets determined monthly.  The Company 
understands that (i) the utilization of this imaging equipment will enhance 
the service provided to the Company's shareholders, and (ii) TMC will make 
the equipment available for the Company's benefit so long as the Company 
specifies to TMC.  Upon termination of this arrangement, and if TMC disposes 
of the equipment, the amount realized will be applied first to TMC's 
undepreciated cost in the equipment.  Any excess of the amount realized will 
be paid to the Company to the extent of its reimbursements under this 
paragraph.

     4.   This arrangement was first approved by the Company in 1994, and was 
revised on June 20, 1996 to clarify the allocation of depreciation costs 
described in the preceding paragraph.  The arrangement will continue for 
successive 12-month terms thereafter, unless sooner terminated on 60 days' 
notice by either party to the other.  The Company's board of directors will 
review this arrangement periodically.  The Company may request at any time, 
and TMC will furnish, information permitting the Company's board of directors 
to evaluate if:

          (a)  the arrangement and its continuation is in the best interest 
of the Company and its shareholders; 

          (b)  the services to be performed pursuant to the arrangement are 
services required for the Company's operation; 

          (c)  TMC or its affiliate can provide services the nature and 
quality of which are at least equal to those provided by 
others offering the same or similar services; and

          (d)  the fees for the services are fair and reasonable in light of 
the usual and customary charges made by others for services of 
the same nature and quality.


                                  THORNBURG INVESTMENT TRUST


                                  By:_____________________________________


                                  THORNBURG MANAGEMENT COMPANY, INC.


                                  By:_____________________________________


<PAGE>
                               EXHIBIT 12

                                Thornburg
                                 New York 
                               Intermediate
                              Municipal Fund
                  Interim Unaudited Financial Statements
                             October 31, 1997

     S t a t e m e n t  o f  A s s e t s  a n d  L i a b i l i t i e s

Thornburg New York Intermediate Municipal Fund  
October 31, 1997
(unaudited)

ASSETS

Investments, at value (cost $25,222,955)                       $27,145,425
Interest receivable                                                437,387
Receivable for fund shares sold                                        105
Prepaid expenses and other assets                                    6,077
                                                               -----------
                              TOTAL ASSETS                     $27,588,994

LIABILITIES

BANK OVERDRAFT                                                     458,993
Dividends payable                                                   41,967
                                                                  --------
                              TOTAL LIABILITIES                    526,594

NET ASSETS                                                     $27,062,400

NET ASSET VALUE:

Class A Shares:
Net asset value and redemption price per share
($27,062,400 applicable to 2,147,513 shares of
 beneficial interest outstanding)                                   $12.60

Maximum sales charge, 3.50% of offering
price (3.63% of net asset value per share)                             .46

Maximum Offering Price Per Share                                    $13.06

See notes to financial statements.



                 S t a t e m e n t  o f  O p e r a t i o n s

Thornburg New York Intermediate Municipal Fund 
Period Ended October 31, 1997 
(unaudited)

INVESTMENT INCOME
Interest income (net of premium amortized
     of $18,895)                                                  $250,404


EXPENSES
Investment advisory fees  (Note 4)                                  22,288
Administration fees (Note 4)                                         5,596
Service fees (Note 4)                                               10,253
Transfer agent fees                                                  3,021
Custodian fees                                                       4,560
Professional fees                                                    1,487
Accounting fees                                                        399
Registration and filing fees                                           836
Other expenses                                                       1,293
                                                                    ------
                              TOTAL EXPENSES                        49,733
Less:
  Expenses waived by investment adviser (Note 4)	                    (9,119)

                              NET EXPENSES                          40,614

                              NET INVESTMENT INCOME	                209,790

REALIZED AND UNREALIZED
GAIN (LOSS) ON INVESTMENTS
Net realized loss on investments sold                               (8,551)
Increase in unrealized appreciation 
   of investments                                                  236,327
                              NET REALIZED AND UNREALIZED
                                  GAIN ON INVESTMENTS              227,776

                              NET INCREASE IN NET ASSETS RESULTING
                                  FROM OPERATIONS	                 $437,566

See notes to financial statements.

n o t e s  t o  f i n a n c i a l  s t a t e m e n t s

Thornburg New York Intermediate Municipal Fund 

Note 1 - ORGANIZATION

Thornburg New York Intermediate Municipal Fund (the "Fund"), is a series of 
Thornburg Investment Trust (the "Trust", formerly known as Thornburg Income 
Trust). The Trust is organized as a Massachusetts business trust under a 
Declaration of Trust dated June 3, 1987 and is registered as a diversified, 
open-end management investment company under the Investment Company Act of 
1940, as amended. The Trust is currently issuing six series of shares of 
beneficial interest in addition to those of the Fund:  Thornburg Florida 
Intermediate Municipal Fund, Thornburg New Mexico Intermediate Municipal 
Fund, Thornburg Intermediate Municipal Fund, Thornburg  Limited Term U.S. 
Government Fund, Thornburg Limited Term Income Fund and Thornburg Value 
Fund. Each series is considered to be a separate entity for financial 
reporting and tax purposes.  The Fund's investment objective is to obtain 
as high a level of current income exempt from Federal income tax as is 
consistent with the preservation of capital.

Note 2 - SIGNIFICANT ACCOUNTING POLICIES
Significant accounting policies of the Fund are as follows:
Valuation of Investments:  In determining net asset value, the Fund 
utilizes an independent pricing service approved by the Trustees. Debt 
investment securities have a primary market over the counter and are valued 
on the basis of valuations furnished by the pricing service. The pricing 
service values portfolio securities at quoted bid prices or the yield 
equivalents when quotations are not readily available. Securities for which 
quotations are not readily available are valued at fair value as determined 
by the pricing service using methods which include consideration of yields 
or prices of municipal obligations of comparable quality, type of issue, 
coupon, maturity, and rating; indications as to value from dealers and 
general market conditions. The valuation procedures used by the pricing 
service and the portfolio valuations received by the Fund are reviewed by 
the officers of the Fund under the general supervision of the Trustees. 
Short-term obligations having remaining maturities of 60 days or less are 
valued at amortized cost, which approximates market value. 
Federal Income Taxes:  It is the policy of the Fund to comply with the 
provisions of the Internal Revenue Code applicable to "regulated investment 
companies" and to distribute all of its taxable (if any) and tax exempt 
income to its shareholders. Therefore no provision for Federal income tax 
is required. Dividends paid by the Fund for the period ended October 31, 
1997 represent exempt interest dividends which are excludable by 
shareholders from gross income for Federal income tax purposes.
When-Issued and Delayed Delivery Transactions:  The Fund may engage in 
when-issued or delayed delivery transactions.  To the extent the Fund 
engages in such transactions, it will do so for the purpose of acquiring 
portfolio securities consistent with its investment objectives and not for 
the purpose of investment leverage or to speculate on interest rate 
changes. At the time the Fund makes a commitment to purchase a security on 
a when-issued basis, it will record the transaction and reflect the value 
in determining its net asset value. When effecting such transactions, 
assets of the Fund of an amount sufficient to make payment for the 
portfolio securities to be purchased will be segregated on the Fund's 
records on the trade date. Securities purchased on a when-issued or delayed 
delivery basis do not earn interest until the settlement date.
Dividends:  Net investment income of the Fund is declared daily as a 
dividend on shares for which the Fund has received payment. Dividends are 
paid monthly and are reinvested in additional shares of the Fund at net 
asset value per share at the close of business on the dividend payment 
date, or at the shareholder's option, paid in cash.  Net capital gains, to 
the extent available, will be distributed annually.
General:  Securities transactions are accounted for on a trade date basis. 
 Interest income is accrued as earned.  Premiums and original issue 
discounts on securities purchased are amortized over the life of the 
respective securities.  Realized gains and losses from the sale of 
securities are recorded on an identified cost basis.
Use of Estimates: The preparation of financial statements, in conformity 
with generally accepted accounting principles, requires management to make 
estimates and assumptions that affect the reported amounts of assets and 
liabilities and the disclosure of contingent assets and liabilities at the 
date of the financial statements and the reported amounts of increases and 
decreases in net assets from operations during the reporting period. Actual 
results could differ from those estimates.
Note 3 - MERGER OF MACKENZIE NEW YORK MUNICIPAL FUND
On September 4, 1997, the Fund acquired all of the net assets of the 
MacKenzie New York Municipal Fund ("MacKenzie") pursuant to a plan of 
organization approved by MacKenzie's shareholders.   The merger was 
accomplished by a tax-free exchange of Class A shares of the Fund (valued 
at $29,612,415) for the net assets of MacKenzie which aggregated 
$29,612,415, including $1,686,143 of unrealized appreciation. 

Note 4 - INVESTMENT ADVISORY FEE AND OTHER TRANSACTIONS WITH AFFILIATES
Pursuant to an investment advisory agreement, Thornburg Management Company, 
Inc. (the "Adviser") serves as the investment adviser and performs services 
for which the fees are payable at the end of each month.  For the period 
ending October 31, 1997, these fees were payable at annual rates ranging 
from 1/2 of 1% to 11/40 of 1% of the average daily net assets of the Fund. 
 The Fund entered into an Administrative Services Agreement with the 
Adviser, whereby the Adviser will perform certain administrative services 
for the shareholders and for which fees will be payable at an annual rate 
of up to 1/8 of 1% of the average daily net assets.  For the period ended 
October 31, 1997, the Adviser voluntarily waived certain operating expenses 
amounting to $9,119.

The Fund has an underwriting agreement with Thornburg Securities 
Corporation (the "Distributor"), which acts as the Distributor of Fund 
shares.  For the period ended October 31, 1997, the Distributor earned 
commissions aggregating $185 from the sale of Class A shares.

Pursuant to a Service Plan, under Rule 12b-1 of the Investment Company Act 
of 1940, the Fund may reimburse to the Adviser an amount not to exceed .25 
of 1% per annum of the Fund's average net assets for payments made by the 
Adviser to securities dealers and other financial institutions to obtain 
various shareholder related services. The Adviser may pay out of its own 
funds additional expenses for distribution of the Fund's shares. 

Certain officers and trustees of the Fund are also officers and/or 
directors of the Adviser and Distributor. The compensation of unaffiliated 
trustees is borne by the Trust. 

Note 5 - SHARES OF BENEFICIAL INTEREST:

At October 31, 1997, there were an unlimited number of shares of beneficial 
interest authorized, and capital paid-in aggregated $26,834,634.  
Transactions in shares of beneficial interest were as follows:

Period Ended October 31, 1997

Class A Shares                      Shares     Amount

Shares sold                         18,780	     $234,813
   Shares issued to shareholders
   in reinvestment of
   distributions                     9,925      124,845
Shares issued in merger          2,368,993   29,612,415
Shares repurchased                (250,185)  	(3,137,449)
   Net Increase                  2,147,513  	$26,834,624

Note 6 - SECURITIES TRANSACTIONS

For the period ended October 31,1997 the Fund had purchase and sale 
transactions (excluding short-term securities) of $5,347,541 and 
$4,245,000, respectively.

The cost of investments for Federal income tax purposes is $25,222,955.

At October 31, 1997, net unrealized appreciation of investments was 
$1,922,470, resulting from $1,925,530 gross unrealized appreciation and 
$3,060 gross unrealized depreciation.

Accumulated net realized losses from securities transactions included in 
net assets at October 31, 1997 aggregated $8,551.



                   F I N A N C I A L  H I G H L I G H T S

Thornburg New York Intermediate Municipal Fund 

Per share operating performance
(for a share outstanding
 throughout the period)

Period from September 4, 1997 (a)
to October 31, 1997
- ---------------------------------

Net asset value, beginning of period                                $12.50
Income from investment operations:
Net investment income                                                  .09
Net realized and unrealized
   gain (loss) on investments                                          .10
Total from investment operations                                       .19
Less distributions from:
   Net investment income                                              (.09)
Change in net asset value	                                              .10

Net asset value, end of period	                                      $12.60

Total Return (b)                                                     1.54%

Ratios/Supplemental Data
Ratios to average net assets:
   Net investment income                                          3.86%(c)
   Expenses, after expense reductions                              .91%(c)
   Expenses, before expense reductions	                            1.12%(c)

Portfolio turnover rate	                                             15.36%

Net assets at end of period (000)                                  $27,062

(a)	Commencement of operations.
(b)	Sales loads are not reflected in computing total return, which is not
   annualized for periods less than one year.
(c)	Annualized.



               S C H E D U L E  O F   I N V E S T M E N T S

Thornburg New York Intermediate Municipal Fund 
October 31, 1997    CUSIPS:  Class A - 885-215-665
NASDAQ Symbols:  Class A - THNYX
<TABLE>
Principal                                                                                         Credit Rating+
Amount     Issuer-Description                                                                      Moody's/S&P    Value
- ---------  ----------------------------------------------------------------------                  -----------   -------
<C>        <C>                                                                                          <C>      <C>
	  590,000  Amherst Industrial Development Authority Lease Revenue Bonds Series A, 5.25% due 10/1/07
           (Pink Complex Project; LOC: Key Bank)                                                        NR/A     596,336
  	310,000	  Amherst Industrial Development Authority Lease Revenue Bonds Series A, 5.25% due 10/1/08
           (Pink Complex Project; LOC: Key Bank)                                                        NR/A     310,753
  	700,000  	Bethlehem New York Central School District General Obligation, 7.10% due 11/1/06
           (Insured: AMBAC)                                                                            Aaa/AAA   829,717
  300,000  Brookhaven New York Series A, 7.00% due 11/1/04 (Insured: MBIA)                             Aaa/AAA   345,777
  215,000  Canastota New York Central School District General Obligation, 7.10% due 6/15/07           Baa2/NR    253,317
  205,000  Canastota New York Central School District General Obligation, 7.10% due 6/15/08           Baa2/NR    242,584
  550,000  Guam Power Authority Revenue Series A, 6.625% due 10/1/14                                    NR/BBB   597,036
1,000,000  	Metropolitan Transportation Authority New York Commuter Facility Rev., 5.50% due 7/1/06
           (Insured: AMBAC)                                                                            Aaa/AAA 1,060,730
  500,000  Metropolitan Transportation Authority New York Service Contract Rev., 7.00% due 7/1/04     Baa1/BBB   548,310
  600,000  Metropolitan Transportation Authority New York Transportation Auth., 5.10% due 7/1/98       Baa/BBB   604,992
  880,000  Monroe County Industrial Development Agency Revenue, 6.45% due 2/1/14
           Civic Facility - DePaul Community Facility Project; LOC: Fleet Bank of New York)             Aa/NR    957,545
1,000,000  New York, New York General Obligation Series B, 7.20% due 8/15/08                          Baa1/BBB 1,141,060
  240,000  New York, New York General Obligation Series B-1, 7.30% due 8/15/10,
           pre-refunded 8/15/04 @ 101                                                                   NR/BBB+  283,159
   10,000  New York, New York Unrefunded Balance General Obligation Series B-1, 7.30% due 8/15/10     Baa1/BBB    11,467
  435,000  New York, New York Unrefunded Balance General Obligation , 7.10% due 2/1/09                Baa1/BBB+  487,618
   65,000  New York, New York Unrefunded Balance General Obligation , 7.10% due 2/1/09                Baa1/BBB+   71,318
  275,000  New York, New York General Obligation, 7.00% due 2/1/19                                      A2/A-1   307,205
  225,000  New York, New York General Obligation, 7.00% due 2/1/19                                      A2/A-1   247,018
1,000,000  New York, New York General Obligation, 9.875% due 11/15/97                                   A2/A-1 1,344,140
  200,000  New York Dormitory Authority Revenue, 7.85% due 2/1/29
           (Park Ridge Housing Inc. Project; Collateralized: GNMA)                                      NR/AAA   211,390
  500,000  New York Dormitory Authority Revenue City University System Series C, 6.00% due 7/1/16     Baa1/BBB   509,800
  500,000  New York Dormitory Authority Revenue, 7.35% due 8/1/29
           (Jewish Geriatric Project; Insured: FHA)                                                     NR/AAA   559,275
  500,000  New York Dormitory Authority Revenue St. University Educational Fac. Series B,
           6.25% due 5/15/14                                                                          Baa1/BBB+  573,105
  505,000  New York Dormitory Authority, 6.00% due 7/1/08 
           (Champlain Valley Physicians Project; LOC: Connie Lee)                                       NR/AAA   555,091
  400,000  New York Environmental Facilities Corp. Pollution Control Revenue St. Water Revolving Fund
           Series B, 7.50% due 3/15/11 (LOC: Pollution Control SRF)                                    Aa2/AA-   423,956
1,000,000  New York Environmental Facilities Corp. Pollution Control Revenue St. Water Revolving Fund
           Series E, 6.875% due 6/15/14 (LOC: Pollution Control SRF)                                   Aa2/A-1 1,142,720
   30,000  New York Housing Finance Agency Ref St. University Construction Series A, 8.00% due 11/1/00,
           pre-refunded 11/1/98 @ 102 (Collateralized: Govt Securities)                                Aaa/AAA    31,804
  750,000  New York Housing Finance Agency SVC Contract Obligation Rev. Series A, 6.375% due 9/15/15  Baa1/BBB+  813,248
  600,000  New York Medical Care Facilities Finance Agency Rev. Series B, 7.45% due 2/15/29,
           pre-refunded 2/15/00 @  102 (St. Lukes Hospital Project; Insured: FHA)                      Aaa/AAA   655,062
1,000,000  New York Medical Care Facilities Finance Agency Rev. Secured Hospital Rev. Series 1991-A,
           7.35% due 8/15/11                                                                           Baa/BBB 1,103,990
  650,000  New York Medical Care Facilities Finance Agency Rev. Series A, 6.50% due 11/1/19,
           (Aurelia Osborn Fox Memorial Hospital Project; Insured: FSA)                                Aaa/AAA   706,492
  500,000  New York Medical Care Facilities Finance Agency Rev. Series A, 6.80% due 2/15/20,
           (New York Downtown Hospital Project)                                                        Baa/BBB   543,390
  500,000  New York Medical Care Facilities Finance Agency Rev. Series A, 6.85% due 2/15/17,
           (Brookdale Hospital Medical Center Project)                                                 Baa/BBB   548,665
  495,000  New York Medical Care Facilities Finance Agency Rev. Series A, 6.00% due 11/15/03,
           (Sec Mtg Prog - Adult Day Care Project; LOC: Sonyma)                                        Aa2/NR    533,328
   85,000  New York Medical Care Facilities Finance Agency Rev. Hospital and Nursing Home Series C,
           7.70% due 2/15/22, pre-refunded 8/15/98 @ 102 (Insured: FHA)                                Aa2/AAA    89,195
1,000,000  New York Mortgage Agency Rev. Series 29-B, 6.45% 4/1/15                                     Aa2/NR  1,067,860
  850,000  New York Muni Bd Bk Agency Special Program Rev. Buffalo Series A, 6.875% due 3/15/06         NR/BBB+  921,018
   70,000  New York Urban Development Corp Rev. Correctional Facilities Series D, 7.75% due 1/1/13,
           pre-refunded 1/1/98 @ 102 (Insured: AMBAC)                                                  Aaa/AAA    71,852
   30,000  New York Urban Development Corp Rev. Correctional Facilities Series C, 7.75% due 1/1/13,
           pre-refunded 1/1/98 @ 102 (Insured: AMBAC)                                                  Aaa/AAA    30,794
2,000,000  New York Urban Development Corp Rev. Correctional Facilities Series C, 0% due 1/1/08       Baa1/BBB 1,218,980
  400,000  Onondaga County Industrial Development Agency Civic Facility Rev Crouse Irving Co Inc
           Series A, 7.90% (LOC: Fleet Trust Company)                                                   NR/A     441,228
  400,000  Puerto Rico Commonwealth Capital Appreciation, 0% due 7/1/04                               Baa1/A     294,420
  300,000  Puerto Rico Public Buildings Authority Rev. Series J, 6.60% due 7/1/04 
           (Guaranteed: Commonwealth)                                                                 Baa1/A     327,234
  400,000  Puerto Rico Electric Power Authority Power Rev. Series O, 6.80% 7/1/00                     Baa1/BBB   421,940
  300,000  Puerto Rico Industrial Tourist Educational Medical and Environmental Control Facilities
           Series A, 5.70% due 8/1/13 (Polytechnic University Puerto Rico Project)                      NR/BBB-  302,022
  650,000  Schenectady Municipal Housing Authority, 6.40% due 5/1/14
           (Annie Schaffer Senior Center Project; LOC: Sonyma)                                          Aa/NR    685,237
  100,000  Southampton Village General Obligation Series B, 7.60% due 9/1/03 (Insured: MBIA)           Aaa/AAA   116,689
  375,000  Syracuse Industrial Development Authority - Pilot Revenue, 5.125% due 10/15/02 
           (LOC: Pacific Mutual / ABN MRO)                                                              NR/AA    382,463
  500,000  Triborough Bridge and Tunnel Authority Special Obligation Series B, 6.875% due 1/1/15        A1/A-    544,725
  625,000  Valley Central School District Montgomery, 7.15% due 6/15/07 (Insured: AMBAC)               Aaa/AAA   746,569
  165,000  Watkins Glen Central School District, 7.00% due 6/15/04 (Insured: MBIA)                     Aaa/AAA   191,626
  110,000  Waverly General Obligation, 9.05% due 6/15/04 (Insured: MBIA)                               Aaa/Baa2  140,175
TOTAL INVESTMENTS (Cost $25,222,955)                                                                         $27,145,425
</TABLE>
           * The cost for Federal income taxes is the same.
           = Credit ratings are unaudited.
             See notes to financial statements.

<PAGE>
                               EXHIBIT 15.1

                PLAN AND AGREEMENT OF DISTRIBUTION
                      PURSUANT TO RULE 12b-1


     THIS PLAN AND AGREEMENT is made as of the 1st day of November, 1997, 
by and between Thornburg Investment Trust, a Massachusetts business trust 
(the "Trust"), in respect of its respective series (hereinafter designated 
collectively, the "Funds," and individually, a "Fund"), and Thornburg 
Management Company, Inc., a Delaware corporation ("Thornburg").

                             RECITALS

     1.   The Trust engages in business as an open-end management 
investment company and is registered as such under the Investment Company 
Act of 1940, as amended (the " 1940 Act").

     2.   The Trust previously adopted on behalf of Thornburg Limited Term 
U.S. Government Fund (Classes A, C and I), Thornburg Limited Term Income 
Fund (Classes A, C and I), Thornburg Intermediate Municipal Fund (Classes 
A, C and I), Thornburg New Mexico Intermediate Municipal Fund (Class A), 
Thornburg Florida Intermediate Municipal Fund (Class A), Thornburg New York 
Intermediate Municipal Fund (Class A) and Thornburg Value Fund (Classes A 
and C) certain service plans to authorize the use of each of those Fund's 
assets to finance certain activities as permitted under Rule 12b-1 adopted 
under the 1940 Act, and in this regard entered into agreements to retain 
Thornburg in accordance with those plans.  The parties seek to combine 
those plans and agreements into this one plan and agreement (the "Plan and 
Agreement") for their mutual convenience.

     3.   Thornburg seeks to be retained to perform services for each of 
the Funds in accordance with the Plan and Agreement.  This Plan and 
Agreement may be made applicable to one or more additional classes of 
shares or funds by the parties execution of one or more supplements to this 
Plan and Agreement.

     4.   This Plan and Agreement has been approved as to each class of 
shares and each Fund by a vote of the Trustees of the Trust, including a 
majority of the Trustees who are not interested persons of the Trust, as 
defined in the 1940 Act, and who have no direct or indirect financial 
interest in the operation of this Plan and Agreement (sometimes the 
"Disinterested Trustees"), cast in person at a meeting called for the 
purpose of voting on this Plan and Agreement.


                             AGREEMENT

     NOW, THEREFORE, the Trust having adopted this Plan in respect of each 
of the Funds, the Trust and Thornburg hereby enter into this Agreement 
pursuant to the Plan in accordance with the requirements of Rule 12b-1 
under the 1940 Act, and provide and agree as follows:

     1.   The Trust is hereby authorized to utilize the assets of each Fund 
to finance certain activities in connection with distribution of the Fund's 
Class A, Class C and Class I shares and providing shareholder services.

     2.   Subject to the supervision of the Trustees, the Trust hereby 
retains and appoints Thornburg as its agent to obtain shareholder services 
and to promote the distribution of each Fund's Class A, Class C and Class I 
shares by providing services and engaging in activities beyond those 
specifically required by the Distribution Agreement between the Trust and 
Thornburg Securities Corporation ("TSC") and to provide related services.  
The activities and services to be provided by Thornburg to each class of 
shares of each Fund hereunder shall include one or more of the following:  
(a) the payment of compensation (including incentive compensation) to 
securities dealers, financial institutions and other organizations which 
render services to the class of shareholders as the Trust may from time to 
time agree, and which render distribution, shareholder account services, 
and administrative services in connection with the distribution of the 
class of shares, all as the Trust may from time to time agree; (b) the 
printing and distribution of reports and prospectuses for the use of 
potential investors in each Fund; (c) preparing and distributing sales 
literature; (d) providing advertising and engaging in other promotional 
activities, including direct mail solicitation, and television, radio, 
newspaper and other media advertisements; and (e) such other services and 
activities as may from time to time be agreed upon by the Trust including, 
but not limited to, providing personal services to shareholders, 
maintaining shareholder accounts, providing shareholder liaison services 
and providing information to shareholders.

     3.   Thornburg hereby undertakes to use its best efforts to promote 
sales of each class of shares of each Fund to investors and to promote 
shareholder services by engaging in those activities specified in paragraph 
2 above as may be necessary and as it from time to time believes will best 
further sales of such shares.  In so doing, Thornburg may utilize the 
services of TSC.

     4.   The Trust is hereby authorized to expend, out of each class of 
assets of each Fund, on a monthly basis, and shall reimburse Thornburg 
monthly to such extent, for its actual direct expenditures incurred in 
engaging in the activities and providing the services specified in 
paragraph 2 above for that class of shares of that Fund, an amount computed 
at an annual rate of up to .25 of 1% of the Fund's average daily net assets 
attributable to the class of shares, together with any applicable gross 
receipts tax, sales tax, value added tax, compensating tax or similar 
exaction imposed by any federal, state or local government, but the 
aggregate of those taxes will not exceed 10%.

     5.   To the extent that expenditures made by Thornburg out of its own 
resources to finance any activity primarily intended to result in the sale 
of shares of a class or a Fund, pursuant to this Plan and Agreement or 
otherwise, may be deemed to constitute the indirect use of the Fund's 
assets, such indirect use of the Fund's assets is hereby authorized in 
addition to, and not in lieu of, any other payments authorized under this 
Plan and Agreement.

     6.   The Treasurer of the Trust shall provide and the Trustees shall 
review, at least quarterly, a written report of all amounts expended 
pursuant to the Plan and Agreement.  Each such report shall itemize the 
types of expenses incurred for which payment is being made and the purposes 
and the amounts of such expenses.  Upon request, Thornburg shall provide to 
the Trustees such information as may reasonably be required for it to 
review the continuing appropriateness of the Plan and Agreement.

     7.   This Plan and Agreement is effective as of the date first set 
forth above for the Funds and their respective classes of shares identified 
in the second Recital.  The Plan and Agreement will become effective 
immediately as to other classes of shares or funds upon execution of a 
supplement to this Plan and Agreement after approval by the Trustees of the 
supplement and any shareholder approvals then required by the 1940 Act or 
the rules thereunder.  Thereafter, the Plan and Agreement shall continue in 
effect for each Fund and each of its respective classes from year to year, 
provided that continuance is approved at least annually by a vote of the 
Trustees, including a majority of the Disinterested Trustees, cast in 
person at a meeting called for the purpose of voting on such continuance.  
The Plan may be terminated as to any class of shares of any Fund at any 
time, without penalty, by the vote of a majority of the Disinterested 
Trustees or by the vote of a majority of the outstanding shares of the 
class.  Thornburg, or the Trust by vote of a majority of the Disinterested 
Trustees or of the holders of a majority of a class's shares, may terminate 
the Agreement under this Plan as to the class, without penalty, upon 30 
days' written notice to the other party.  The parties acknowledge and agree 
that this Plan and Agreement is applicable from time to time to one or more 
classes of shares and Funds, but that the Plan and Agreement applies 
separately to each class of shares and each Fund, and is severable in all 
respects.  Consequently, the Agreement may be modified, continued or 
terminated as to one class of shares of a Fund without affecting any other 
class of shares or any other Fund.

     8.   So long as the Plan remains in effect, the selection and 
nomination of persons to serve as Trustees of the Trust who are not 
"interested persons" of the Trust shall be committed to the discretion of 
the Trustees then in office who are not "interested persons" of the Trust. 
 However, nothing contained herein shall prevent the participation of other 
persons in the selection and nomination process, provided that a final 
decision on any such selection or nomination is within the discretion of, 
and approved by, a majority of the Trustees then in office who are not 
"interested persons" of the Trust.

     9.   This Plan may not be amended to increase materially the amount to 
be spent by the Trust hereunder as to any class of shares without approval 
of the shareholders of the affected class.  All material amendments to the 
Plan and to the Agreement must be approved by the vote of the Trustees, 
including a majority of the Disinterested Trustees, cast in person at a 
meeting called for the purpose of voting on such amendment.

     10.  To the extent that this Plan and Agreement constitutes a plan of 
distribution adopted pursuant to Rule 12b-1 under the 1940 Act it shall 
remain in effect as such, so as to authorize the use by the Trust of each 
Fund's assets in the amounts and for the purposes set forth herein, 
notwithstanding the occurrence of an assignment, as defined by the 1940 Act 
and the rules thereunder.  To the extent it constitutes an agreement 
pursuant to a plan, it shall terminate automatically in the event of an 
attempted assignment.  Upon a termination of the Agreement as to any Fund 
or any class, the Trust may continue to make payments on behalf of the Fund 
or class pursuant to the Plan only upon the approval of a new Agreement, 
which may or may not be with Thornburg, or the adoption of other 
arrangements regarding the use of the amounts authorized to be paid by the 
Trust hereunder, by the Trustees in accordance with the procedures set 
forth in paragraph 7 above.

     11.  The Trust shall preserve in an easily accessible place copies of 
this Plan and Agreement and all reports made pursuant to this Plan and 
Agreement, together with minutes of all Trustees' meetings at which the 
adoption, amendment or continuance of the Plan were considered (describing 
the factors considered and the basis for decision), for a period of not 
less than six years from the date of this Plan and Agreement.

     12.  This Plan and Agreement shall be construed in accordance with the 
laws of the State of New Mexico and applicable provisions of the 1940 Act. 
 To the extent the applicable law of the State of New Mexico or any 
provisions herein conflict with the applicable provisions of the 1940 Act, 
the latter shall control.

     13.  The Trustees have authorized the execution of this Agreement in 
their capacity as Trustees and not individually and Thornburg agrees that 
neither shareholders of any Fund nor the Trustees, nor any officer, 
employee, representative or agent of the Trust shall be personally liable 
upon, nor shall resort be had to their private property for the 
satisfaction of, obligations given, executed or delivered on behalf of or 
by the Trust, that the shareholders of every Fund, Trustees, officers, 
employees, representatives and agents of the Trust shall not be personally 
liable hereunder, and that it shall look solely to the property of the 
Funds for the satisfaction of any claim hereunder.

     IN WITNESS WHEREOF, the parties hereto have executed and delivered 
this Plan and Agreement on the day and year first above written in Santa 
Fe, New Mexico.

                                  THORNBURG INVESTMENT TRUST

                                  By:_____________________________________

                                  THORNBURG MANAGEMENT COMPANY, INC.

                                  By:_____________________________________


<PAGE>
                               EXHIBIT 15.2

                 PLAN AND AGREEMENT OF DISTRIBUTION
                       PURSUANT TO RULE 12b-1
                   (Distribution Plan - Class C)

     THIS PLAN AND AGREEMENT is made as of the 1st day of November, 1997, by 
and between Thornburg Investment Trust, a Massachusetts business trust (the 
"Trust"), in respect of its respective series hereinafter designated, 
collectively, the "Funds" and, individually, a "Fund," and Thornburg 
Securities Corporation, a Delaware corporation ("Thornburg").

                             RECITALS

     1.   The Trust engages in business as an open-end management investment 
company and is registered as such under the Investment Company Act of 1940, 
as amended (the "1940 Act").

     2.   The Trust previously adopted on behalf of Thornburg Limited Term 
U.S. Government Fund, Thornburg Limited Term Income Fund, Thornburg 
Intermediate Municipal Fund and Thornburg Value Fund certain distribution 
plans to authorize the use of each of those Fund's assets to finance certain 
activities as permitted under Rule 12b-1 adopted under the 1940 Act, and in 
this regard entered into agreements to retain Thornburg in accordance with 
those plans.  The parties seek to combine those plans and agreements into 
this one plan and agreement (the "Plan and Agreement") for their mutual 
convenience.

     3.   Thornburg seeks to be retained to perform services in accordance 
with the Plan and Agreement.  This Plan and Agreement may be made applicable 
to one or more additional funds by the parties execution of one or more 
amendments to this Plan and Agreement.

     4.   This Plan and Agreement has been approved as to each Fund by a vote 
of the Trust's Trustees, including a majority of the Trustees who are not 
interested persons of the Trust, as defined in the 1940 Act, and who have no 
direct or indirect financial interest in the operation of this Plan and 
Agreement (sometimes the "Disinterested Trustees"), cast in person at a 
meeting called for the purpose of voting on this Plan and Agreement.

                             AGREEMENT

     NOW, THEREFORE, the Trust having adopted this Plan in respect of each of 
the Funds, the Trust and Thornburg hereby enter into this Agreement pursuant 
to the Plan in accordance with the requirements of Rule 12b-1 under the 1940 
Act, and provide and agree as follows:

     1.   The Trust is hereby authorized to utilize the assets of each Fund 
to finance certain activities in connection with distribution of the Fund's 
Class C shares.

     2.   Subject to the supervision of the Trustees, the Trust hereby 
retains and appoints Thornburg as its agent to promote the distribution of 
the Fund's Class C shares by providing services and engaging in activities 
beyond those specifically required by the Distribution Agreement between the 
Trust and Thornburg and to provide related services.  The activities and 
services to be provided by Thornburg hereunder shall include one or more of 
the following:  (a) the payment of compensation and ongoing commissions 
(including incentive compensation) to securities dealers, financial 
institutions and other organizations which render distribution and 
administrative services in connection with the distribution of Class C shares 
of each Fund; (b) the printing and distribution of reports and prospectuses 
for the use of potential investors in each Fund; (c) preparing and 
distributing sales literature; (d) providing advertising and engaging in 
other promotional activities, including direct mail solicitation, and 
television, radio, newspaper and other media advertisements; and (e) such 
other services and activities as may from time to time be agreed upon by the 
Trust.

     3.   Thornburg hereby undertakes to use its best efforts to promote 
sales of Class C shares of each Fund to investors by engaging in those 
activities specified in paragraph 2 above as may be necessary and as it from 
time to time believes will best further sales of such shares.

     4.   The Trust is hereby authorized to pay to Thornburg for obtaining 
the services described above, out of the assets of each Fund, on a monthly 
basis, an amount computed at an annual rate of .75 of 1% of the Fund's 
average daily net assets attributable to Class C shares of the Fund, together 
with any applicable gross receipts tax, sales tax, value added tax, 
compensating tax or similar exaction imposed by any federal, state or local 
government, but the aggregate of those taxes will not exceed 10%.  The amount 
of the fee payable to Thornburg under this paragraph is not related directly 
to expenses incurred by Thornburg in obtaining the contemplated services for 
each Fund.

     5.   To the extent that expenditures made by Thornburg out of its own 
resources to finance any activity primarily intended to result in the sale of 
shares of a Fund, pursuant to this Plan and Agreement or otherwise, may be 
deemed to constitute the indirect use of the Fund assets, such indirect use 
of Fund assets is hereby authorized in addition to, and not in lieu of, any 
other payments authorized under this Plan and Agreement.

     6.   The Treasurer of the Trust shall provide and the Trustees shall 
review, at least quarterly, a written report of all amounts expended pursuant 
to the Plan and Agreement.  Each such report shall itemize the types of 
expenses incurred for which payment is being made and the purposes and the 
amounts of such expenses.  Upon request, Thornburg shall provide to the 
Trustees such information as may reasonably be required to review the 
continuing appropriateness of the Plan and Agreement.

     7.   This Plan and Agreement is effective as of the date first set forth 
above for the Class C shares of the Funds identified in the second Recital.  
The Plan and Agreement will become effective immediately as to other Funds 
upon execution of a supplement to this Plan and Agreement after approval by 
the Trustees of the supplement and any shareholder approvals then required by 
the 1940 Act or the rules thereunder.  Thereafter, the Plan and Agreement 
shall continue in effect from year to year, provided that continuance is 
approved at least annually by a vote of the Trustees, including a majority of 
the Disinterested Trustees, cast in person at a meeting called for the 
purpose of voting on such continuance.  The Plan may be terminated at any 
time as to the Class C shares of any Fund, without penalty, by the vote of a 
majority of the Disinterested Trustees or by the vote of a majority of the 
outstanding Class C shares of the Fund.  Thornburg, or the Trust by vote of a 
majority of the Disinterested Trustees or of the holders of a majority of a 
Fund's outstanding Class C shares, may terminate the Agreement under this 
Plan as to the Class C shares of the Fund, without penalty, upon 30 days' 
written notice to the other party.  The parties acknowledge and agree that 
this Plan and Agreement is applicable from time to time to one or more Funds, 
but that the Plan and Agreement applies separately to each class of shares 
and each Fund, and is severable in all respects.  Consequently, the Agreement 
may be modified, continued or terminated as to one class of shares of a Fund 
without affecting any other class of shares or any other Fund.

     8.   So long as the Plan remains in effect, the selection and nomination 
of persons to serve as Trustees of the Trust who are not "interested persons" 
of the Trust shall be committed to the discretion of the Trustees then in 
office who are not "interested persons" of the Trust.  However, nothing 
contained herein shall prevent the participation of other persons in the 
selection and nomination process, provided that a final decision on any such 
selection or nomination is within the discretion of, and approved by, a 
majority of the Trustees then in office who are not "interested persons" of 
the Trust.

     9.   This Plan may not be amended to increase materially the amount to 
be spent by the Trust hereunder without approval of the Class C shareholders 
of the affected Fund.  All material amendments to the Plan and to the 
Agreement must be approved by the vote of the Trustees, including a majority 
of the Disinterested Trustees, cast in person at a meeting called for the 
purpose of voting on such amendment.

     10.  To the extent that this Plan and Agreement constitutes a plan of 
distribution adopted pursuant to Rule 12b-1 under the 1940 Act it shall 
remain in effect as such, so as to authorize the use by the Trust of the 
Fund's assets in the amounts and for the purposes set forth herein, 
notwithstanding the occurrence of an assignment, as defined by the 1940 Act 
and the rules thereunder.  To the extent it constitutes an agreement pursuant 
to a plan, it shall terminate automatically in the event of an attempted 
assignment.  Upon a termination of the Agreement as to any Fund, the Trust 
may continue to make payments on behalf of the Fund pursuant to the Plan only 
upon the approval of a new Agreement, which may or may not be with Thornburg, 
or the adoption of other arrangements regarding the use of the amounts 
authorized to be paid by the Trust hereunder, by the Trustees in accordance 
with the procedures set forth in paragraph 7 above.

     11.  The Trust shall preserve in an easily accessible place copies of 
this Plan and Agreement and all reports made pursuant to this Plan and 
Agreement, together with minutes of all Trustees' meetings at which the 
adoption, amendment or continuance of the Plan were considered (describing 
the factors considered and the basis for decision), for a period of not less 
than six years from the date of this Plan and Agreement.

     12.  This Plan and Agreement shall be construed in accordance with the 
laws of the State of New Mexico and applicable provisions of the 1940 Act.  
To the extent the applicable law of the State of New Mexico or any provisions 
herein conflict with the applicable provisions of the 1940 Act, the latter 
shall control.

     13.  The Trustees have authorized the execution of this Agreement in 
their capacity as Trustees and not individually and Thornburg agrees that 
neither shareholders of any Fund nor the Trustees, nor any officer, employee, 
representative or agent of the Trust shall be personally liable upon, nor 
shall resort be had to their private property for the satisfaction of, 
obligations given, executed or delivered on behalf of or by the Trust, that 
the shareholders of the Fund, Trustees, officers, employees, representatives 
and agents of the Trust shall not be personally liable hereunder, and that it 
shall look solely to the property of the Fund for the satisfaction of any 
claim hereunder.

     IN WITNESS WHEREOF, the parties hereto have executed and delivered this 
Plan and Agreement on the day and year first above written in Santa Fe, New 
Mexico.

                                  THORNBURG INVESTMENT TRUST

                                  By:_____________________________________


                                  THORNBURG SECURITIES CORPORATION

                                  By:_____________________________________




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