SECTION 906 CERTIFICATION CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 Name of Issuer: USAA INVESTMENT TRUST, Total Return Strategy Fund In connection with the Semi-annual Report on Form N-CSR/S (Report) of the above-named issuer for the Fund listed above for the period ended June 30, 2005, the undersigned hereby certifies, that: 1. The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and 2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the issuer. Date: AUGUST 29, 2005 /S/ CHRISTOPHER W. CLAUS --------------- ------------------------- Christopher W. Claus President SECTION 906 CERTIFICATION CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 Name of Issuer: USAA INVESTMENT TRUST, Total Return Strategy Fund In connection with the Semi-annual Report on Form N-CSR/S (Report) of the above-named issuer for the Fund listed above for the period ended June 30, 2005, the undersigned hereby certifies, that: 1. The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and 2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the issuer. Date: AUGUST 29, 2005 /S/ DEBRA K. DUNN --------------- ----------------- Debra K. Dunn Treasurer