SCHEDULE 14A SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. __) Filed by the Registrant [X] Filed by a Party other than the Registrant [ ] Check the appropriate box: [ ] Preliminary Proxy Statement [ ] Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) [ ] Definitive Proxy Statement [x] Definitive Additional Materials [ ] Soliciting Material Pursuant to Section 240.14a-11(c) or Section 240.14a-12 USAA Investment Trust (Name of Registrant as Specified In Its Charter) _________________________________________________________________ (Name of Person(s) Filing Proxy Statement, if other than the Registrant) Payment of Filing Fee (Check the appropriate box): [X] No fee required. [ ] Fee computed on table below per Exchange Act Rules 14a-6(i)(1) and 0-11. 1) Title of each class of securities to which transaction applies: ___________________________________________________________________________ 2) Aggregate number of securities to which transaction applies: ___________________________________________________________________________ 3) Per unit price or other underlying value of transaction computed pursuant to Exchange Act Rule 0-11 (set forth the amount on which the filing fee is calculated and state how it was determined): ___________________________________________________________________________ 4) Proposed maximum aggregate value of transaction: ___________________________________________________________________________ 5) Total fees paid: ___________________________________________________________________________ [ ] Fee paid previously with preliminary materials. [ ] Check box if any part of the fee is offset as provided by Exchange Act Rule 0-11(a)(2) and identify the filing for which the offsetting fee was paid previously. Identify the previous filing by registration statement number, or the Form or Schedule and the date of its filing. 1) Amount Previously Paid: ___________________________________________________________________________ 2) Form, Schedule or Registration Statement No.: ___________________________________________________________________________ 3) Filing Party: ___________________________________________________________________________ 4) Date Filed: ___________________________________________________________________________ [USAA USAA CORNERSTONE STRATEGY FUND EAGLE LOGO (R)] SUPPLEMENT DATED JUNE 30, 2006 TO THE FUND'S PROSPECTUS DATED OCTOBER 1, 2005 AND THE PROXY STATEMENT DATED MAY 26, 2006 At its meeting on June 27, 2006, the Cornerstone Strategy Fund's Board of Trustees approved the addition of international stock exchange-traded funds (ETFs) to the International Stocks investment category. Effective August 1, 2006, the Fund will have the ability to invest up to 50% of the total assets allocated to the International Stocks investment category in international stock ETFs; however, no more than 25% of the Fund's total assets will be invested in ETFs. 60784-0606