Vanguard Admiral ™ Treasury Money Market Fund
 
Summary Prospectus
 
 
 
December 28, 2012
 
 
 
Investor Shares for Participants
 
Vanguard Admiral Treasury Money Market Fund Investor Shares (VUSXX)
 
 
 
 
The Fund’s statutory Prospectus and Statement of Additional Information dated
December 28, 2012, are incorporated into and made part of this Summary
Prospectus by reference.
Before you invest, you may want to review the Fund’s Prospectus, which
contains more information about the Fund and its risks. You can find
the Fund’s Prospectus and other information about the Fund online at
www.vanguard.com/prospectus . You can also get this information at no
cost by calling 800-523-1188 or by sending an e-mail request to
online@vanguard.com.
 
 
 
 
The Securities and Exchange Commission (SEC) has not approved or disapproved these securities or
passed upon the adequacy of this prospectus. Any representation to the contrary is a criminal offense.