No—not in the same sense. A money market fund (MMF) is an investment that can lose principal. An eligible bank deposit may have statutory protection within a specific scheme’s conditions and limits. A cash-like label does not make these protections interchangeable.
Sources checked: 21 October 2026. This educational comparison uses U.S. and EU examples, not rules for every jurisdiction, product, broker, currency or investor. It is not personalised investment, tax or legal advice.
What do you actually own?
A deposit is a contractual claim against a bank. An MMF share is an investment in a pooled securities portfolio. These mutual funds hold liquid short-term debt, cash and cash equivalents; their risk is relatively low compared with many investments, not zero. Read the prospectus and shareholder report. SEC · Investor.gov.
- Deposit: check the bank, eligible product, depositor and applicable guarantee limit.
- Fund: check portfolio risk, share value and redemption terms; there is no deposit guarantee simply because a bank or broker sells it.
- Custody: protection when an intermediary fails is a different question from protection against investment loss.
Where do deposit guarantees apply?
In the U.S., FDIC insurance covers deposits only at FDIC-insured banks, generally $250,000 per depositor, per insured bank, per ownership category. Non-deposit investments are not covered, even when an insured bank sells them. FDIC. In the EU, Directive 2014/49/EU requires countries to have at least one deposit guarantee scheme joined by banks and maintains harmonised protection of €100,000. National lists identify protected deposit types. Eligibility, institution, depositor, jurisdiction, ownership category and limits matter; these figures are not universal protection for cash-like products. European Commission. See our EU deposit protection guide.
What can go wrong inside a fund?
Credit deterioration, interest-rate changes and movements in net asset value (NAV) can affect principal. Stressed asset prices and heavy redemptions can impede immediate redemption or principal preservation and force sales in falling markets. Government or public-debt portfolios can reduce some credit risk, but are not universal principal guarantees. Currency, fees, tax and operational or custody risks also need assessment. EU Regulation · recitals 3–7.
Do fund labels and liquidity rules make it guaranteed?
No. EU public-debt constant NAV (CNAV), low-volatility NAV (LVNAV) and variable NAV (VNAV) are product structures, not a safety ranking or a promise that prices cannot move. Diversification, maturity and liquidity rules mitigate risk; they do not create deposit insurance. Article 35 prohibits external support. Article 36 requires marketing documents to say the fund is not guaranteed, does not rely on external support to guarantee liquidity or stabilise NAV, and leaves principal-loss risk with the investor. EU Regulation · Articles 35–36. U.S. rules also include liquidity requirements and redemption or liquidity tools; the applicable fund category matters. SEC · 2023 final rule.
Does broker protection cover a falling fund price?
No. SIPC is non-governmental and applies only to member firms. When a member brokerage fails, missing customer cash and securities may be protected up to $500,000, including a $250,000 cash limit. It does not cover market-value declines or guarantee an MMF’s NAV. SEC · SIPC. EU investor-compensation arrangements likewise cannot be equated with deposit guarantees without country and product analysis. Our EU broker and ETF protection guide explains the separate custody question.
What does the quoted yield leave out?
MMF dividends generally reflect short-term interest rates. A quoted yield may be backward-looking, may deduct only some fees and can change; it is not a promise of future income. Compare fees, your tax treatment and the currency in which you will spend the money. No current numerical yield or guaranteed after-tax outcome is assumed here. SEC · Investor.gov.
What should an international investor check?
Identify the exact legal fund, share class, domicile and currency. Read the portfolio, weighted maturity and liquidity disclosures, not just the app’s product name. Verify dealing cut-offs, settlement timing, fees, tax treatment and where uninvested cash sits. Establish which institution holds that cash and whether it is an eligible deposit or another investment. Do not assume immediate access, principal stability or protection; consult the prospectus and shareholder report. SEC · Investor.gov.
How might an emergency reserve be split by purpose?
Example, not advice: a household could keep money for immediately due bills in an eligible insured deposit, within the relevant limit and after checking access terms. A separate short-term reserve might be invested in an MMF only if the household accepts investment risk and redemption and settlement timing. If a bill falls due before fund proceeds are available, the two pots do not serve the same purpose. This example specifies no allocation, return or guaranteed access: check the actual deposit and fund terms before relying on either.