Fund Basics
What kind of product is an MMF (money market fund)?
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An MMF is a fund that invests in short-maturity, low-credit-risk money market instruments such as government bonds and Monetary Stabilization Bonds, high-grade commercial paper (CP) and certificates of deposit (CDs).
Because same-day deposits and same-day redemptions are possible, it is widely used to park spare cash temporarily. However, an MMF is still a fund, so principal is not guaranteed.
This answer is general financial information as of 2026-10-14, not investment advice. Rules and tax rates change, so please also check the latest guidance from the source institution.
