Amortized Cost is “Fair” for Money Market Funds

Summary

Recent events have caused the U.S. Securities and Exchange Commission (SEC) to rethink the long-standing use of amortized cost by money market mutual funds in valuing their investments in securities. This practice supports the use of the stable net asset value (a “buck” a share) in trading shares in such funds. Some critics have challenged this accounting practice, arguing that it somehow misleads investors by obfuscating changes in value or implicitly guaranteeing a stable share price.

This paper shows that the use of amortized cost by money market mutual funds is supported by more than 30 years of regulatory and accounting standard-setting consideration. In addition, its use has been significantly constrained through recent SEC actions that further ensure its appropriate use. Accounting standard setters have accepted this treatment as being in compliance with generally accepted accounting principles (GAAP). Finally, available data indicate that amortized cost does not differ materially from market value for investments industry wide. In short, amortized cost is “fair” for money market funds.