Curated by: Rubric Advisors
Personal Finance
Money Market Accounts vs Money Market Funds
The key differences between money market accounts and money market funds, including insurance coverage, yields, liquidity features, and when each option fits best.
Money Market Accounts vs Money Market Funds
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What Is a Money Market Account?
- A money market account (MMA) is a deposit account at a bank or credit union
- It typically pays a higher interest rate than a regular savings account
- MMAs are FDIC-insured up to $250,000 per depositor per institution
- Many MMAs come with check-writing and debit card access for easy withdrawals
- Rates are variable and can change at the bank's discretion at any time
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Full Guide
What Is a Money Market Account?
- A money market account (MMA) is a deposit account at a bank or credit union
- It typically pays a higher interest rate than a regular savings account
- MMAs are FDIC-insured up to $250,000 per depositor per institution
- Many MMAs come with check-writing and debit card access for easy withdrawals
- Rates are variable and can change at the bank's discretion at any time
What Is a Money Market Fund?
- A money market fund is a mutual fund that invests in short-term, high-quality debt securities
- It aims to maintain a stable net asset value (NAV) of $1.00 per share
- Money market funds are not FDIC-insured but are covered by SIPC if the brokerage fails
- They invest in Treasury bills, commercial paper, repurchase agreements, and similar instruments
- Yields fluctuate daily based on the underlying portfolio and current short-term rates
Government vs Prime Funds
- Government money market funds invest at least 99.5% in government securities and repos
- Prime funds can hold corporate debt like commercial paper, typically offering slightly higher yields
- Government funds are considered safer and may have fewer liquidity restrictions
- Prime funds may impose liquidity fees or redemption gates during periods of market stress
- Treasury-only funds offer state tax exemption on interest, a benefit for high-tax-state residents
Insurance and Safety Differences
- MMAs carry FDIC insurance protecting your principal up to the coverage limit
- Money market funds have no government guarantee, the $1.00 NAV is a target, not a promise
- In 2008, one prominent fund "broke the buck" when its NAV fell below $1.00
- SEC reforms since 2014 have strengthened money market fund liquidity requirements
- For amounts above FDIC limits, spreading across institutions or using a sweep network helps
Yield and Cost Comparison
- Money market funds often yield more than bank MMAs, especially at large brokerages
- Banks may offer promotional MMA rates that revert to lower levels after an introductory period
- Money market funds charge a small expense ratio, typically 0.10% to 0.40% annually
- MMAs generally have no explicit fees but may require minimum balances to earn the top rate
- Compare the net yield after fees and any minimum balance requirements before choosing
Liquidity and Access
- MMAs typically offer check-writing, debit cards, and ATM access for convenient spending
- Money market funds are redeemed through your brokerage, usually settling in one business day
- Some brokerages offer check-writing on money market fund shares for added convenience
- Both options provide high liquidity, but MMAs offer more direct spending features
- Neither is designed for frequent transactions, consider a checking account for daily use
Key Takeaways
- Choose an MMA when FDIC insurance and direct spending access are your top priorities
- Choose a money market fund when you want competitive yields within a brokerage account
- Government and Treasury funds add a layer of safety and potential state tax benefits
- Neither option is a long-term investment, both are best for cash reserves and short-term needs
- Review yields, fees, and minimum balances regularly as rates and offerings change
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