Few pairs of financial terms cause more genuine confusion than "money market account" and "money market fund." They share a name, they both aim to be low-risk places for cash, and they're often mentioned in the same conversation — but they are fundamentally different products with different protections. Getting this distinction right matters, especially when it comes to understanding how your money is insured.
Two Different Categories of Product
A money market account is a deposit account offered by a bank or credit union. Your money sits with the institution, earns interest, and — critically — is protected by FDIC or NCUA insurance up to $250,000 per depositor, per institution, per ownership category.
A money market fund is a mutual fund — an investment product, typically bought and held through a brokerage or retirement account. The fund pools money from many investors and buys short-term, high-quality debt instruments such as Treasury bills, commercial paper, and short-term certificates of deposit.
Why the Names Overlap
Both products take their name from the "money market" — the broader financial market for short-term borrowing and lending between governments, banks, and corporations. A money market fund invests directly in that market's instruments. A money market account, meanwhile, is simply a bank deposit product that historically competed for savers' attention using similar features and terminology. The shared name reflects a shared concept, not a shared structure.
The Insurance Difference Is the Big One
Money market funds are regulated as securities, not deposits, so they fall outside FDIC and NCUA coverage entirely. Many funds are designed to maintain a stable share price (commonly $1.00), and in normal conditions they do so reliably, but that stability is a fund objective, not a guarantee. Our guide to money market account FDIC insurance explains exactly how deposit coverage works for the account side of this comparison.
Risk and Return Profile
| Factor | Money Market Account | Money Market Fund |
|---|---|---|
| Product type | Bank deposit | Investment (mutual fund) |
| Insurance | FDIC/NCUA, up to $250,000 | None |
| Where held | Bank or credit union | Brokerage or retirement account |
| Principal risk | Effectively none, within insurance limits | Low, but not zero |
| Typical use | Emergency fund, short-term savings | Cash management within an investment portfolio |
Where You're Likely to Encounter Each
You'll typically open a money market account directly with a bank or credit union, the same way you'd open a savings or checking account. A money market fund, by contrast, usually shows up as a cash-equivalent holding inside a brokerage account — for example, as a place to park uninvested cash between trades, or as a conservative holding within a retirement account.
Common Mistakes
- Assuming a "money market fund" held at a brokerage carries the same FDIC insurance as a bank money market account.
- Choosing a product based on the name alone rather than checking whether it's a deposit or an investment.
- Overlooking that a fund's yield and a bank account's rate are not directly comparable without understanding the underlying structure.
Conclusion
A money market account and a money market fund solve a similar problem — a relatively safe, liquid home for cash — through very different mechanisms. One is an insured bank deposit; the other is an uninsured investment fund. Knowing which one you're looking at, and understanding what protection actually applies, is essential before you decide where to park your money.