Vanguard money market fund asset pricing policy

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(from the Prospectus)

SHARE PRICE

Multiple-class funds do not have a share price. Rather, each class has a share price, called its net asset value, or NAV, that is calculated each business day after the close of regular trading on the New York Stock Exchange (the Exchange), generally 4 p.m., Eastern time. NAV per share for the Prime Money Market Fund is computed by dividing the net assets allocated to each share class by the number of Fund shares outstanding for that class. NAV per share for the Federal, Treasury, and Admiral Treasury Money Market Funds is computed by dividing the net assets of the Fund by the number of Fund shares outstanding. On holidays or other days when the Exchange is closed, the NAV is not calculated, and the Fund does not transact purchase or redemption requests.

The Exchange typically observes the following holidays: New Year's Day, Martin Luther King, Jr. Day, Presidents' Day (Washington's Birthday), Good Friday, Memorial Day, Independence Day, Labor Day, Thanksgiving Day, and Christmas Day. Although each Fund expects the same holidays to be observed in the future, the Exchange may modify its holiday schedule or hours of operation at any time.

The instruments held by the Funds are valued on the basis of amortized cost. It is the policy of the Vanguard money market funds to attempt to maintain a net asset value of $1.00 per share for sales and redemptions. The instruments held by a money market fund are valued on the basis of amortized cost, which does not take into account unrealized capital gains or losses. This involves valuing an instrument at its cost and thereafter assuming a constant amortization to maturity of any discount or premium, regardless of the impact of fluctuating interest rates on the market value of the instrument. While this method provides certainty in valuation, it may result in periods during which value, as determined by amortized cost, is higher or lower than the price that the fund would receive if it sold the instrument. The Fund's holdings will be reviewed by the trustees, at such intervals as they may deem appropriate, to determine whether the fund's NAV calculated by using available market quotations deviates from $1.00 per share based on amortized cost. The extent of any deviation will be examined by the trustees. If such deviation exceeds 1/2 of 1%, the trustees will promptly consider what action, if any, will be initiated. In the event the trustees determine that a deviation exists which may result in material dilution or other unfair results to investors or existing shareholders, they have agreed to take such corrective action as they regard as necessary and appropriate, including the sale of fund instruments prior to maturity to realize capital gains or losses or to shorten average fund maturity; withholding dividends; making a special capital distribution; redemptions of shares in kind; or establishing a net asset value per share by using available market quotations.

The use of amortized cost and the maintenance of money market fund's net asset value at $1.00 is based on its election to operate under Rule 2a-7 under the 1940 Act. As a condition of operating under that rule, each fund must maintain a dollar-weighted average portfolio maturity of 90 days or less, purchase only instruments having remaining maturities of 397 days or less, and invest only in securities that are determined by methods approved by the trustees to present minimal credit risks and that are of high quality as determined by the requisite rating services, or in the case of an instrument not so rated, determined by methods approved by the trustees to be of comparable quality. Although the stable share price is not guaranteed, the NAV of Vanguard money markets funds is expected to remain at $1 per share. Instruments are purchased and managed with that goal in mind.

PURCHASE AND REDEMPTION OF SHARES

Each Fund may suspend redemption privileges or postpone the date of payment for redeemed shares:

  1. During any period that the Exchange is closed or trading on the Exchange is restricted as determined by the SEC;
  2. During any period when an emergency exists, as defined by the SEC, as a result of which it is not reasonably practicable for the Fund to dispose of securities it owns or to fairly determine the value of its assets;
  3. For such other periods as the SEC may permit. Each Fund has filed a notice of election with the SEC to pay in cash all redemptions requested by any shareholder of record limited in amount during any 90-day period to the lesser of $250,000 or 1% of the net assets of the Fund at the beginning of such period.

If Vanguard determines that it would be detrimental to the best interests of the remaining shareholders of a Fund to make payment wholly or partly in cash, the Fund may pay the redemption price in whole or in part by a distribution in kind of readily marketable securities held by the Fund in lieu of cash in conformity with applicable rules of the SEC. Investors may incur brokerage charges on the sale of such securities received in payment of redemptions.

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