Fidelity Prime Money Market Mutual Funds

Fidelity money market mutual funds are aligned with new U.S. Securities and Exchange Commission (SEC) rules that Fidelity implemented on October 1, 2016. Below are details about available prime funds.

Prime fund features

  • Taxable funds investing in corporate and government securities
  • For retirement and nonretirement accounts
  • May impose redemption fee or temporarily halt redemptions if fund liquidity falls below regulatory limits during a period of extraordinary market stress

Available funds


Retail funds are able to transact at traditional, stable $1.00 net asset value (NAV) per share. They are available only to "natural persons" investors who are not corporations or other types of organizations.

Fidelity Money Market

For investments of $100,000+, $1million+, or $10million+
Fidelity Money Market – Premium Class
FIMM Money Market – Class I
FIMM Money Market – IL Class (FNSXX)


Institutional funds transact at a floating four-decimal NAV (e.g., $1.0000), and are available to corporations and other types of organizations.

For investments of $1 million+, or $10million+
FIMM Prime Reserves – Class I
FIMM Prime Reserves – IL Class (FHPXX)

Learn more

What are money market funds?

Learn more about money market funds, a type of fixed income mutual fund that invests in debt securities characterized by their short maturities and minimal credit risk.