Before You Deposit Stablecoins: 4 Sources That Reveal Yield Risks

Key Takeaways on Stablecoin Interest Rates and Risk

Two structurally different models produce stablecoin yield, and each carries its own failure mode.

• Reserve-based yield comes from interest earned on the assets backing the coin, usually short-term government debt, and tracks policy rates closely.

• Activity-based yield comes from deploying deposited coins into lending, margin, or arbitrage activity, and moves with crypto market demand rather than interest rate cycles.

• Advertised APYs in the double digits almost always signal activity-based or incentive-driven returns, which carry meaningfully higher tail risk than reserve income.

• Redemption terms, not the yield number, determine what you can actually recover in a stress event, and those terms vary sharply by jurisdiction and issuer.

• Regulatory frameworks are catching up unevenly, so the same stablecoin can offer different real-world protections depending on where you hold it and who issued it.

Treat every stablecoin yield offer as a question about mechanism first, rate second.

Where Stablecoin Yield Actually Comes From

Yield has to originate somewhere, and tracing that source tells you more about risk than the percentage ever will. Centralized exchanges and issuers generally remunerate holders through one of two models: reserve-based income or activity-based deployment, and the BIS has documented how these produce distinct risk dynamics even when the advertised rate looks identical on the surface.

1. Centralized exchange programs. Many platforms take stablecoin deposits and route them into internal lending books, margin trading, or arbitrage desks. Your yield is effectively a slice of the exchange’s trading and lending revenue, which means it rises and falls with market volatility and exchange solvency.

2. DeFi lending and liquidity provision. Depositing stablecoins into a lending protocol or a liquidity pool generates yield from borrower interest or trading fees. This layer adds smart-contract risk and, in liquidity pools, impermanent loss if the pool’s assets diverge in price.

3. Reserve-asset income. Fully reserved stablecoins hold assets like Treasury bills or repo agreements, and pass along a portion of that interest income to holders. This model ties yield to policy rates, but it also creates a duration and liquidity tradeoff: longer-dated bonds pay more but are harder to sell quickly in a run.

4. Token incentives and promotional rewards. New protocols and exchanges often subsidize yield with their own native tokens to bootstrap deposits. These reward cliffs can evaporate the moment the promotional budget runs out or the token’s price collapses.

Each channel answers a different question: is this yield paid from real economic activity, or is it a temporary subsidy? A protocol offering 4% from Treasury bill income is fundamentally different from one offering 15% funded by token emissions. The BIS’s own framework for decomposing advertised APYs into their underlying revenue sources is the single most useful habit you can adopt before depositing anything. Reserve income is slow and boring. Activity-based and incentive-driven yield is fast, exciting, and considerably more fragile when demand reverses.

What Drives Stablecoin Interest Rates Up or Down

Reserve-based yields move with benchmark interest rates set by central banks, since the underlying assets are typically short-term government securities. When policy rates rise, reserve-backed stablecoin yields tend to rise with them, and when rates fall, so the income issuers can pass through.

Activity-based yields respond to an entirely different signal: crypto market demand, leverage, and trading volume. During a bull run, demand for margin and borrowing spikes, pushing activity-based yields higher. During a downturn, that demand dries up fast, and yields compress or disappear.

• Benchmark rate cycles set the ceiling for reserve-based returns.

• Trading volume and leverage demand set the ceiling for activity-based returns.

• Promotional incentives distort both models temporarily and are the least sustainable driver.

• Redemption pressure itself can spike short-term yields as issuers compete for deposits during outflow periods.

Research from the BIS on remuneration models confirms that reserve-based remuneration tracks policy-rate cycles while activity-based remuneration is inherently more volatile and procyclical, rising fastest exactly when speculative demand is highest and falling fastest when it isn’t. That procyclicality is the mechanism behind every “yield that seemed too good to last.”

The Core Risks Behind Every Stablecoin Yield

Every yield source above maps to a specific risk category, and each one produces a different kind of loss: some cost you money, others just cost you access to your own funds.

• Depeg risk. If the coin’s market price drops below its intended peg, whoever is holding it during redemption absorbs the loss. Depegs happen when reserve quality is thin, when confidence erodes, or when a large holder exits fast enough to overwhelm liquidity.

• Liquidity mismatch and fire-sale risk. Reserves invested in longer-duration or less liquid assets can’t be converted to cash instantly. A redemption shock can deplete cash buffers, force the sale of bonds at a discount, and trigger a reinforcing loop that spreads stress into Treasury and repo markets well beyond the stablecoin itself.

• Counterparty and custody risk. If your coins are lent out, rehypothecated, or held by a third-party custodian, you’re exposed to that party’s solvency, not just the issuer’s. A custodial failure can freeze your assets even if the coin itself never depegs.

• Smart-contract, bridge, and oracle risk. DeFi lending and liquidity positions depend on code that can be exploited, bridges that can be drained, and price oracles that can be manipulated. An audit covers a moment in time, not the contract’s entire life, so admin privileges and post-audit changes matter more than the audit badge itself.

• Operational and governance risk. Many issuers retain the power to pause transfers, upgrade contracts, or freeze specific addresses. These powers exist for legitimate compliance reasons, but they also mean your access to funds depends on decisions made by people you’ve never met.

• Jurisdictional and regulatory risk. Redemption rights differ by country and by issuer structure, and a rule change can alter your practical ability to convert stablecoins to cash overnight.

An IMF review of stablecoin exposure frames this well: investors face layered exposure across reserve-asset markets, liquidity, credit, operations, and governance simultaneously, and redemption can become difficult even when the peg itself hasn’t moved. That distinction between value loss and access loss matters enormously for how you plan around it.

Pro Tip: A “fully backed” claim tells you almost nothing about a run scenario. Ask how liquid the backing assets actually are under stress, not just what percentage they cover, since the IMF’s own modeling shows headline backing ratios can mask serious liquidity mismatches.

Regulation, Redemption Rights, and Systemic Risk

Regulatory frameworks don’t just add paperwork, they determine whether your redemption right is enforceable or discretionary. The Financial Stability Board recommends that investors verify the legal redemption claim, reserve composition, governance structure, and disclosure practices behind any stablecoin before relying on it, and it explicitly does not treat algorithmic stabilization as an effective substitute for real reserve backing.

Redemption rights vary sharply by jurisdiction. Some frameworks require continuous, near-instant redemption at par. Others permit business-day processing windows, redemption caps, or fees, and some jurisdictions specifically prohibit issuers from paying interest directly to holders, pushing yield programs onto affiliated exchanges or third-party platforms instead. That structural workaround adds another layer between you and your funds.

• Confirm whether redemption is a legal right enforceable against the issuer or a discretionary practice that can be suspended.

• Check whether your jurisdiction allows direct issuer-paid interest or routes yield through a separate entity.

• Ask what happens to your redemption priority if the issuer becomes insolvent.

The systemic angle matters too, especially for institutional allocators managing correlated exposure. Because many reserves sit in short-term government securities and repo markets, a large enough redemption wave doesn’t just hurt the stablecoin issuer, it can ripple into the broader funding markets those reserves depend on. Regulators are increasingly aware of this channel, which is part of why capital and liquidity buffer design has become a live policy debate rather than a technical footnote.

How to Evaluate Any Stablecoin Yield Opportunity

Run every opportunity through this sequence before committing capital, and don’t skip steps just because the yield looks safe.

1. Identify the legal claimant. Determine exactly who owes you redemption: the issuer, an exchange, or a third-party platform, and under what contract terms.

2. Inspect reserve composition and segregation. Ask whether reserves are segregated from operating funds and whether they’ve been rehypothecated or pledged as collateral elsewhere.

3. Test the redemption path yourself. Withdraw a small amount first and time it. Note any queue mechanics, fees, or delays before scaling your position.

4. Review audit and proof-of-reserve scope. Confirm what the audit actually covers, how recently it was conducted, and whether it addresses liquidity, not just asset totals.

5. Map governance and operational controls. Find out who can pause transfers, upgrade contracts, or move reserve assets, and under what conditions.

6. Check counterparty concentration. If yield comes from lending, ask who the borrowers are and what collateral secures those loans.

7. Watch for standard red flags. Opaque reserve reporting, inconsistent audit scope between reports, and reused custodial rails across supposedly independent products are all warning signs worth walking away from.

Pro Tip: Diversification across ticker symbols means little if every coin you hold shares the same custodian or the same redemption rail behind the scenes. As IMF researchers note, map exposure by issuer, custodian, chain, and redemption path, not by brand name, since that’s where correlated failure actually lives. Ulys’s glossary on non-custodial wallets is a useful starting point for understanding one dependency you can eliminate entirely.

Stress-Testing Advertised APYs Before You Commit

A high APY is a claim, not a guarantee, and you should treat it the way an analyst treats a forecast: worth testing before you believe it.

1. Decompose the rate into its revenue source. Separate reserve income, borrower interest, trading profit, and token incentives, then ask what happens to each component if demand drops 50% or the incentive budget runs out. The BIS’s own decomposition approach is built for exactly this exercise.

2. Run a redemption spike scenario. Model what happens if a large share of depositors exit within a single week. Would reserves cover it without forced asset sales?

3. Rehearse your own exit. Withdraw a modest amount before scaling exposure, and document the timing, fees, and any friction you hit.

4. Map dependencies for common-mode failure. If your custodian, bank partner, or bridge provider fails, how many of your positions go down together?

5. Size positions to your worst case, not your best case. Never allocate an amount you’d be uncomfortable losing entirely if the yield source disappears overnight.

Regulatory design choices matter here too. BIS modeling shows that liquidity and capital thresholds, when built as genuinely usable buffers rather than rigid minimums that force fire sales, measurably delay the point at which an issuer starts dumping assets under stress. That’s a meaningful signal to look for in an issuer’s public disclosures.

For institutional committees, building a simple loss-and-access waterfall, documenting which risk category triggers first and what recovery looks like at each stage, turns this table into an actual approval framework rather than a reference chart.

The Ulys View: What Non-Custodial Access Solves and What It Doesn’t

Holding stablecoins in a non-custodial wallet removes one specific risk from the stack: the risk that a custodian surrenders, freezes, or rehypothecates your assets without your consent. That’s a real and meaningful reduction in counterparty exposure. It does nothing, however, to change the issuer’s reserve quality, the redemption terms written into that stablecoin’s legal structure, or the smart-contract risk of any DeFi protocol you choose to deposit into. Non-custodial control changes who can touch your keys. It doesn’t change what backs the coin.

Practically, that means the due diligence habits above still apply in full, you’ve just removed one layer of counterparty risk from the equation. Active monitoring with market sentiment insights and multi-chain visibility can help watch for early warning signs such as unusual withdrawal friction, sudden rate changes, and shifting sentiment before they become a liquidity event. Rehearsing a small withdrawal, keeping funding options flexible across traditional and crypto rails, and moving quickly across chains when something looks off are practical behaviors that can help protect capital.

FAQ

Can You Actually Get Yield on Stablecoins?

Yes. Yield comes from reserve income on backing assets, from lending and market activity on centralized platforms, or from DeFi lending and liquidity provision. The rate you’re offered reflects which of these sources is funding it and how much risk that source carries.

How Risky Is Holding a Stablecoin for Yield?

Risk varies widely by issuer, reserve quality, and jurisdiction, but the IMF’s layered-exposure framework shows investors face reserve-asset, liquidity, credit, operational, and governance risk simultaneously. Even a stablecoin that never depegs can leave you unable to redeem quickly during a stress event.

Is Investing in Stablecoins for Yield a Good Idea?

It can be reasonable for investors who verify the legal redemption claim, inspect reserve composition, and test their own exit path before committing meaningful capital. It’s a poor idea for anyone treating the advertised APY as risk-free cash, since every yield source above reserve income carries real tail risk.

Which Stablecoin Offers the Best Yield?

There’s no single answer, since rates shift with policy cycles for reserve-based coins and with market activity for activity-based programs. Rather than chasing the highest number, decompose the rate into its actual source and weigh it against the issuer’s redemption terms, reserve transparency, and governance controls before comparing yields across coins.

Disclaimer: Nothing in this content is intended to be professional advice, including without limitation, financial, investment, legal or tax advice. Ulys is not responsible for your use of or reliance on any information in this entry as it is provided solely for educational purposes. Purchasing crypto assets carries a high level of risk, including price volatility, regulatory changes, and cyber attacks. On-chain transactions are irreversible once confirmed, and errors may result in permanent loss. Please make sure to do your own research and make decisions based on your unique circumstances. Ulys does not itself provide financial services or engage in regulated activities such as money transmission, custodial services, securities brokerage, or lending. Any licensed financial services (e.g., payment processing, crypto-to-fiat transactions, or lending) are facilitated entirely by third-party providers, who are responsible for obtaining and maintaining the necessary licenses under applicable U.S. federal and state laws.

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