Bank deposits have deposit insurance — does a stablecoin have absolutely no protection at all?
This needs to be looked at on two levels. First, the issuer itself — most stablecoin issuers today (like Circle or Tether) aren't banks, and the funds you hand over to them in exchange for a stablecoin aren't covered by general deposit insurance (like FDIC in the U.S.), because that money has already been used to buy Treasuries, enter repurchase agreements, and so on — it isn't "sitting" in an insured bank account. Second, where the reserve assets themselves are held — some issuers keep a portion of reserve cash in accounts at insured banks, and that portion is theoretically covered up to that bank account's deposit insurance limit, but the coverage applies to the issuer's account, not to you individually, and the limit is usually far below the issuer's total reserve holdings.
In practice, this means that if an issuer fails or its reserves develop a significant shortfall, stablecoin holders are in a position closer to "fund investors" than "bank depositors" — you have a right to claim redemption, but no government-guaranteed fixed amount, and how much you actually get back depends on how much value remains in the reserve assets at liquidation and the priority order of the liquidation process.
Why do stablecoin regulatory frameworks mimic money market fund rules instead of directly applying bank regulation?
Because stablecoin issuers aren't fundamentally doing a bank's core business — "take deposits, lend them out, earn the spread" — they're doing a money market fund's core business: "pool capital, invest in short-term highly liquid assets, maintain a stable face value." Bank regulation's core logic centers on capital adequacy ratios, lending risk controls, and deposit insurance funds — tools designed to address the maturity mismatch risk that comes from a bank "borrowing short, lending long" (using short-term deposits to fund long-term loans). Stablecoin issuers, in theory, don't do lending at all — their reserve assets are themselves required to be highly liquid and short-duration, which is almost identical to the asset-allocation logic that constrains money market funds.
This is also why the GENIUS Act's reserve requirements — primarily cash, Treasuries, and repurchase agreements, with limits on asset maturity and credit quality — read like an echo of the SEC's Rule 2a-7 for money market funds. Both are solving the same structural problem: how a basket of short-term assets can support a promise of "redeemable at face value anytime" — not the maturity-mismatch problem that bank regulation is built to handle.
How exactly did the Reserve Primary Fund's 2008 "breaking the buck" happen, and what parallels does it offer for stablecoin depegging?
The Reserve Primary Fund was a large money market fund that, during the 2008 financial crisis, held commercial paper issued by Lehman Brothers. After Lehman's bankruptcy, that portion of assets became worth almost nothing, causing the fund's net asset value to fall below the $1-per-share threshold, down to $0.97 — this is what's known as "breaking the buck." Once news broke, investors began redeeming en masse, effectively a fund-industry version of a bank run, ultimately prompting the U.S. Treasury to roll out an emergency temporary guarantee program to stabilize the entire money market fund industry.
The parallel with stablecoin depegging is this: both types of instruments' "maintain $1" promise rests on the assumption that underlying assets can hold sufficient value and liquidity. Once underlying assets suffer a genuine loss (not temporary liquidity tightness, but the assets themselves actually losing value or defaulting), the net asset value or token value genuinely falls below $1 — it isn't a temporary sentiment issue. The 2022 UST collapse and multiple algorithmic-stablecoin depeg events are, at their core, the same mechanism replaying itself under different asset structures. The difference is that a stablecoin's underlying assets are usually more conservative than 2008-era commercial paper (mostly Treasuries), but the maturity and transparency of stablecoin regulatory frameworks are still catching up to the regulatory evolution path money market funds have already gone through.
If a stablecoin is really closer to a money market fund, what standards should I use to select and evaluate the ones I hold?
You can borrow a few of the core questions institutional investors use to evaluate money market funds. First, reserve asset composition — the higher the share of cash and short-duration Treasuries, the better the liquidity buffer; if reserves include commercial paper, corporate debt, or other higher-credit-risk assets, that indicates a higher chance of the net asset value being affected under market stress. Second, the frequency and independence of reserve disclosure — whether a third-party accounting firm audits it regularly, whether disclosure happens monthly, quarterly, or less often, and whether the disclosed content is specific down to asset class and maturity rather than just a vague "100% fully reserved" figure. Third, whether the issuer has been through a redemption stress test before — for example, during a panic-selling event, whether the issuer could process a large volume of redemption requests within a reasonable timeframe without suspending redemptions or imposing significant delays.
You don't need to read every line of a full reserve audit report to check these — but building the habit of "treating a stablecoin like a fund holding you actively check, not a deposit you just set and forget" will by itself help you avoid most of the highest-risk options.
Many people new to stablecoins intuitively think of them as "digital bank deposits" — you deposit, you can withdraw anytime, the face value never changes. That intuition isn't wrong from a user-experience standpoint, but if you want to understand a stablecoin's actual risk structure, the more accurate traditional-finance counterpart is a money market fund (MMF), not a bank deposit. The difference between the two determines what protection your money actually has in an extreme scenario.
A bank deposit works like this: you deposit money with a bank, the bank lends and invests it, and the spread it earns is the bank's income — but the bank owes you a legally fixed repayment obligation on your deposit. Whether the bank's investments with your money win or lose, the number in your account stays the same; that risk is borne by the bank's shareholders, and most countries' deposit insurance (like FDIC in the U.S.) provides coverage up to a certain amount if the bank fails. Stablecoins don't work this way at all: fiat-reserve stablecoin issuers (like USDC or USDT) take the dollars you exchanged and buy Treasuries, place them in deposits, or enter repurchase agreements — these reserve assets are theoretically supposed to back the circulating tokens 1:1, but the issuer owes you no legally fixed repayment obligation the way a bank owes a depositor. Whether you can redeem depends on whether the issuer actually has the capacity and willingness to honor that redemption.
A money market fund's operating logic actually closely resembles a stablecoin's: the fund company pools investor money and buys short-term, highly liquid assets (Treasury bills, commercial paper, repurchase agreements), and the fund's net asset value is theoretically meant to hold at $1 per share, with investors able to subscribe and redeem at any time. This structure is essentially the same logic as a stablecoin — what you hold isn't a legal claim against the issuer (the way a bank deposit is), but an indirect claim on a basket of underlying assets, and whether the net asset value can hold at $1 depends on the quality and liquidity of those underlying assets. During the 2008 financial crisis, the Reserve Primary Fund — a money market fund — famously "broke the buck," with its net asset value falling to $0.97, triggering a mass redemption wave. This is the most fitting historical precedent for understanding stablecoin depeg risk — not a bank run, but a fund's net asset value genuinely failing to hold up under losses in its underlying assets.
The GENIUS Act's requirements for stablecoin reserve assets — highly liquid, short-duration, primarily cash and Treasuries — are essentially a rewrite of the money market fund regulatory framework's logic (the SEC's Rule 2a-7): restricting what assets a fund can hold, requiring certain daily and weekly liquidity buffers, and specifying redemption mechanisms under stress. This isn't a coincidence — regulators recognized that both financial instruments are essentially solving the same problem (how a basket of short-term assets can support a promise of "redeemable at face value anytime") and borrowed the same risk-management logic. The difference is that money market funds have decades of regulatory evolution behind them (including multiple rule revisions after 2008), while stablecoin regulatory frameworks have only just started taking shape in recent years.
Treating a stablecoin as a bank deposit intuitively leads you to underestimate one thing: stablecoins have no deposit insurance. If an issuer fails or its reserve assets suffer significant losses, your redemption right depends on the issuer's solvency and process, not a government-guaranteed fixed amount. This doesn't mean stablecoins are necessarily riskier than bank deposits — it means you should evaluate them the way you'd evaluate a money market fund: regularly check reserve disclosure reports for asset composition (what share is cash, how long the Treasury maturities run, whether there's commercial paper or other higher-credit-risk assets), check whether the issuer undergoes independent audits, and understand whether the issuer's liquidity buffer can hold up under an extreme redemption wave. These are exactly the standard checklist items institutional investors use to evaluate money market funds, and they apply equally to evaluating the stablecoin you hold.