Best Stablecoin Yields in DeFi (October 2026)

The best stablecoin yield is the rate you can explain, exit, and afford to be wrong about. For a straightforward default, Aave V3 USDC on Ethereum is still the large lending market we would open first. Fluid is paying more from borrower demand today, Spark and Sky are the steadier savings rates, and a named Morpho vault can beat Aave only after you accept a curator.

Bottom line: Aave is the default, at 4.20% supply APY on about $2.38 billion of USDC. Fluid’s 7.96% is the higher lending rate in this snapshot, and it is also the one furthest above its own 30-day average. Spark and Sky are the steady 3.80% savings options. Gauntlet USDC Prime is the curated-vault pick. Pendle, Ethena and incentivized Curve pools stay in a separate, higher-complexity bucket.

Rates snapshot: 2026-10-15, about 03:42 UTC. Aave, Fluid and Morpho current rates come from each protocol’s public API at that time. Spark, Sky, Ethena, Pendle, Curve and Venus current rates come from DeFiLlama and, for the Pendle row, Pendle’s market API, pulled the same morning. The 30-day column is the average of DeFiLlama’s daily snapshots from 15 September through 14 October 2026. Rates, rewards and withdrawal liquidity can move the same day. This is research, not a promise of returns or personalized financial advice.

Best stablecoin yield right now

We ranked opportunities by the quality of the yield source, liquidity you can actually withdraw, how close the live rate sits to its 30-day average, how many contracts and assets you take on, and how much judgment you hand to a curator or a governance process. We did not sort by the headline APY.

Opportunity	Current rate	30-day average	Size	Where the yield comes from	Our verdict
Aave V3 USDC, Ethereum	4.20%	3.79%	$2.38B supplied	Variable borrower interest	Best default
Fluid fUSDC, Ethereum	7.96%	5.01%	$132.3M supplied	Variable borrower interest, no reward rate	Highest lending rate today
Spark Savings spUSDC, Ethereum	3.80%	3.65%	$305.3M	Spark Liquidity Layer allocations	Best steady USDC vault
Sky Savings sUSDS, Ethereum	3.80%	3.65%	$4.94B	Sky Savings Rate	Best policy-set stablecoin rate
Morpho Gauntlet USDC Prime, Base	4.70% net	4.46%	$413.7M	Curated Morpho lending, 0% performance fee	Best curated vault
Ethena sUSDe, Ethereum	4.89%	4.94%	$1.21B	Staking yield, futures basis/funding and liquid stables	Specialist only
Pendle PT-sUSDS, Ethereum, 26 Nov 2026	4.98% implied	4.94%	$4.77M AMM liquidity	Discount to maturity on sUSDS	Fixed-rate specialist
Curve USDC/RLUSD, Ethereum	4.09% total	4.42%	$52.5M	0.28% base fees + 3.81% incentives	Farming rate, not lending

The three columns that matter most are yield source, 30-day average, and base versus reward. A rate funded by borrowers is a different product from a rate that is almost entirely token incentives. Pool size helps, and it still does not prove you can withdraw. On Aave, about $137.7 million of that $2.38 billion was available when we pulled the API. On Fluid, about $8.3 million was marked currently withdrawable against $132.3 million supplied.

DeFiLlama’s Aave USDC yield record tracks a liquidity figure that collapsed to about $5.4 million at 00:02 UTC, with a 12.66% print. Aave’s own API a few hours later showed $2.38 billion supplied, $137.7 million available and a 4.20% supply APY. We used Aave’s API for the Aave row.

How we ranked the yields

1. Is the yield economically legible?

The cleanest stablecoin yield usually comes from borrowers paying interest. A governance-set savings rate can be attractive too, with more dependence on the issuer’s balance sheet and on whoever sets the rate. Token incentives are the weakest yield in this list because the program can shrink and the reward token can fall.

2. Is the headline rate durable?

Fluid’s 7.96% supply rate compared with a 5.01% 30-day average. The yield is still borrower interest, and the headline is a spike. Aave’s live 4.20% also sat above its 3.79% 30-day average. Spark and Sky barely moved, which fits rates that governance sets rather than a utilization curve alone.

3. What must go right for principal to return?

Every extra token, oracle, curator, bridge, chain, derivative venue or redemption queue is another dependency. That stacking is the practical form of money legos: each block is useful on its own, and each block you add can spread a failure. A higher rate is only better if it pays you for those extra ways to lose principal. A public APY dashboard does not answer that question. The DeFi overview sets the wider map.

4. Can a normal user exit?

We favored sizeable single-asset markets with a visible withdrawal path. TVL is not immediately available liquidity. Lending markets can be mostly borrowed, vaults can have allocated the cash elsewhere, and staked or credit products can impose a queue.

Best USDC yield: Aave V3 on Ethereum

Snapshot: 4.20% supply APY, 3.79% over the prior 30 days, $2.38 billion supplied, 94.2% utilization, about $137.7 million available to withdraw. Variable borrow APY was 4.97%. Source: Aave’s market API for the Ethereum core market, 15 October 2026 at 03:42 UTC.

Aave is the baseline the other rows have to beat. Supply yield comes from overcollateralized borrowers. The rate rises when more of the pool is borrowed and falls when demand fades. Aave’s supply documentation describes that utilization link, and our Aave guide covers how supplying, borrowing and liquidation fit together.

This USDC reserve’s optimal usage rate was 94%. Utilization was 94.2%, just through that kink, so a further jump in borrowing can lift the supply rate quickly and shrink what you can withdraw. The high rate is a stress signal as well as income. Aave’s Ethereum USDT market was larger on the same call, about $2.78 billion supplied at 3.43%, with about $320 million available. USDC paid more. USDT had the deeper exit.

Aave also lists a separate USDC Umbrella market. DeFiLlama showed about $53.2 million there at 5.84% total, split into roughly 4.01% base and 1.83% rewards. The reward slice is an incentive on top of lending, with another contract and a reward token. We left it out of the default.

Why Aave stays first:

The yield source is borrower interest. You do not need a reward token to clear for the rate to exist.
Ethereum USDC keeps the position to one lending protocol and one fiat-backed stablecoin, without a bridge.
The book is large enough, and public enough, that a parameter change is easier to see than in a small anonymous farm.

What can still go wrong:

USDC can depeg, be frozen by its issuer, or take reserve and banking risk. The stablecoin risks primer is the right background before treating a dollar ticker as cash.
Bad debt, a bad oracle, a contract bug or a governance mistake can impair a market.
At this utilization, a withdrawal can wait on repayments. Check available liquidity in the app before you size the position.

Verdict: This is the most defensible starting point if you want onchain dollar yield without a new synthetic dollar, a curator or a maturity date. You accept a lower live rate than Fluid, and you accept a market that is running hot.

Fluid fUSDC: the higher lending rate, with a tighter exit

Snapshot: 7.96% supply rate, zero reward rate, 5.01% 30-day average, $132.3 million supplied. Fluid’s lending API also reported about $8.3 million as currently withdrawable, inside a withdrawal limit near $66.2 million. The rate scaling is the protocol supplyRate divided by 100, which is the same convention DeFiLlama uses for this market.

Fluid suppliers receive an ERC-4626 fToken and earn from demand in Fluid’s unified liquidity system. In August this market’s live rate sat next to its 30-day average. It does not today. The 30-day average of 5.01% is still above Aave’s 3.79%, so the premium is not only a one-hour print. The 7.96% figure itself is a poor forecast of what the position will earn next month.

Why it is still on the list:

The API showed no separate reward rate. The yield on display is the supply rate.
$132 million supplied is a real market, not a dust pool with a theatrical APY.
The asset and the chain match the Aave default: Ethereum USDC.

What the premium is paying for:

Fluid is younger than Aave, and its liquidity is shared across more of the protocol.
Depositors depend on Fluid’s contracts, parameters, oracles, liquidations and governance.
A supply rate this far above its 30-day average tends to fall as deposits arrive or borrows repay. The small currently-withdrawable balance is the part to check in Fluid’s app before depositing.

Verdict: Fluid is the strongest “higher base yield” candidate for someone who already understands lending-protocol risk and will look at withdrawable liquidity, not just APY. The organic source of the yield does not make the extra protocol risk free.

Spark spUSDC and Sky sUSDS: steadier savings rates

Snapshots: Spark Savings spUSDC showed 3.80% current, a 3.65% 30-day average and $305.3 million. Sky sUSDS showed the same 3.80% and 3.65%, on $4.94 billion. Pendle’s sUSDS market reported the same 3.80% underlying rate, which lines up with the Sky print. Spark’s USDT savings vault was larger on the same DeFiLlama pull, about $726 million at 3.75% (3.58% over 30 days).

These products can match on a yield table and still be different positions. Spark’s savings docs say spUSDC is a V2 vault: USDC in, yield from the Spark Liquidity Layer, and USDS backing the dollars. sUSDS earns the Sky Savings Rate set by Sky Governance. Spark’s docs draw that line explicitly. Matching APYs on one morning are not the same mechanism.

Why they stay near the top:

Both rates hugged their 30-day averages. That is the behavior you want if you care more about a rate that survives the week than about today’s richest print.
spUSDC is the USDC on-ramp. sUSDS is the direct Sky savings token.
Spark publishes allocation and risk notes, including a Credora assessment of the USDC vault dated 29 June 2026. A model rating is not insurance, and it is not an October underwriting.

The trade-off:

This is not “lend USDC to overcollateralized borrowers and nothing else.” You take Sky/USDS backing, governance and allocation risk. Money legos are the reason a simple USDC deposit can depend on venues you never opened.
Spark can deploy across DeFi, centralized venues and real-world assets. Diversification changes the failure mode. It does not delete it.
Governance can move the rate. Spark’s own guides say large withdrawals that exceed idle liquidity use an asynchronous request, even when smaller withdrawals are instant.

Verdict: spUSDC fits someone who wants USDC in and a smooth rate. sUSDS fits someone already comfortable holding USDS. Neither is a bank account.

Best stablecoin staking APY

“Staking APY” in search usually points at three different products.

Sky’s 3.80% Savings Rate is the policy-set savings yield on USDS. It is the staking-style rate in this snapshot that we would actually describe to a general reader, because the number is large, stable and attached to a named savings module rather than a reward campaign.

Ethena sUSDe paid 4.89%, with a 4.94% 30-day average, on $1.21 billion, and DeFiLlama still marks a seven-day unstaking period. That rate comes from staked assets, futures funding and basis, and liquid stables. It is a real yield. It is a poor default “stablecoin staking APY,” because USDe is a synthetic dollar and the exit is delayed. Details sit in the specialist section below.

Aave Umbrella’s extra 1.83% on USDC is closer to an incentive for taking safety-module risk than to a savings rate. Treat it as a reward APY. Our APY versus APR explainer is the short version of why a reward line and a borrower-interest line should not be added up and called one thing.

Verdict: If the question is “best stablecoin staking APY” for someone who wants a savings rate, Sky sUSDS at 3.80% is the coherent answer in this snapshot. If the question is “highest number with staking in the name,” sUSDe is higher and much easier to misunderstand.

Morpho curated vaults: Gauntlet USDC Prime

Snapshot: Gauntlet USDC Prime on Base showed $413.7 million, a 4.70% net APY, a 0% performance fee, and Morpho’s own average net APY of 4.72%. DeFiLlama’s 30-day average on the matching vault record was 4.46%. Source: Morpho’s API at 03:42 UTC.

The August edition of this guide featured Steakhouse Prime USDC on Base. Morpho’s API no longer shows that name at anything like the old size. Steakhouse Prime USDC on Base (0xBEEFE94c8aD530842bfE7d8B397938fFc1cb83b2) held about $13.1 million at a 4.47% net APY and a 5% fee. The larger Steakhouse USDC vault on Base held about $121 million, and a 25% performance fee left a net APY of about 3.50%, under Aave. Where an aggregator row disagreed with Morpho’s vault balances, we used Morpho.

Spark’s USDC vault on Base was even larger than Gauntlet, about $470.5 million, at a 4.22% net APY after a 10% fee (4.70% gross). It is a serious vault. It also stacks Spark allocation risk on top of Morpho, which overlaps the Spark section above, and the fee pulls the net rate back to Aave’s neighborhood.

Why Gauntlet Prime is the curated pick this month:

USDC is the loan asset, on a book of hundreds of millions.
The net rate is the gross rate. There is no performance fee to reverse-engineer.
The live net rate, Morpho’s average, and the 30-day DeFiLlama series are in a tight band. That is what a durable base yield looks like.

What you still have to read:

Collateral markets, loan-to-value limits and supply caps.
Curator, owner, allocator and guardian roles, and any timelock.
Oracle design and whether the vault routes into other vaults or adapters.

Morpho’s curator security notes still warn that faulty oracles and some older vault configurations can lose funds. A named curator reduces the number of buttons you must press. It does not remove bad debt, role risk, oracle risk or contract risk.

Verdict: Gauntlet USDC Prime is the curated vault we would compare with Aave. If you only intend to check a logo and an APY, stay with Aave.

Higher-complexity yields

Ethena sUSDe: 4.89% is not USDC lending

sUSDe showed 4.89% current, a 4.94% 30-day average, $1.21 billion and a seven-day unstaking period. USDe is a synthetic dollar. Ethena’s docs describe crypto backing, short futures and liquid stables. The risk page lists funding, liquidation, custody, exchange failure, backing assets and stablecoin exposure.

The rate can look calm, as it did over this 30-day window, and still depend on hedge execution, derivatives venues, custodians and a reserve fund. A 4.89% sUSDe yield is a different bet from 4.20% on Aave USDC once the extra venues and the exit delay are included.

Verdict: A legitimate specialist strategy. A poor default stablecoin recommendation.

Pendle PT-sUSDS: 4.98% fixed to 26 November, on a small book

The August edition used PT-USDai maturing 15 October 2026. That date has arrived, and that market is no longer an active place to put new cash. Pendle’s API on 15 October showed PT-sUSDS maturing 26 November 2026 at a 4.98% implied rate, against a 3.80% underlying Sky Savings Rate. DeFiLlama’s 30-day average of that implied rate was 4.94%. AMM liquidity was about $4.77 million.

A Pendle principal token is bought below its maturity value. Held to maturity, the implied return is locked in units of the underlying. Pendle’s fixed-yield guide explains the mechanic. Selling earlier means taking the market price.

PT-sUSDS is the cleanest fixed-rate stablecoin example left on the board, because the underlying is the same Sky savings position as sUSDS. The liquidity is modest. The fixed rate is not a higher Sky rate guaranteed by Sky. It is a market price for giving up flexibility until 26 November.

USD.AI is still the credit example, not the default. The February 2027 sUSDai principal token implied about 9.15% (10.08% over 30 days) with about $3.9 million of AMM liquidity. The plain PT-USDai February market was about $57,000. USD.AI’s technical overview still describes loans, admin roles and asynchronous redemption. A higher fixed rate there is pay for credit, maturity and liquidity risk.

Verdict: PT-sUSDS is a reasonable fixed-income tool if you already want sUSDS exposure and can hold the date. It is not the best stablecoin yield for a general audience, and the old USDai trade should not be rolled forward just because a later maturity exists.

Curve USDC/RLUSD: 4.09% headline, 0.28% from trading fees

This pool’s total rate looks similar to Aave’s. The composition does not. DeFiLlama split it into about 0.28% base APY and 3.81% reward APY, on $52.5 million. Over the prior 30 days the total averaged 4.42%, and the base component averaged about 0.17%. You also hold two assets, so an RLUSD or USDC move can leave the pool heavy in the weaker one.

Verdict: Useful to someone who already wants both coins and will watch the incentive. It is not 4.09% of borrower-funded interest on USDC.

Farming stablecoins versus lending them

Lending hands a stablecoin to a market that lends it out, and borrowers pay the interest. The risks are utilization, bad debt, oracles, liquidations and the stablecoin itself. Aave and Fluid are lending. Gauntlet Prime is lending with a curator in front.

Farming, in the way this guide uses the word, means you are paid mainly to be in a position: liquidity in a pool, a lockup, a points or token campaign. Curve USDC/RLUSD is the worked example. Most of the displayed APY is the reward token. When emissions fall, or the token price falls, the “best APY on stablecoins” you screenshotted disappears, and you can still be holding the weaker asset after a depeg.

A third pattern sits between them. Spark, Sky, Ethena and Pendle are not generic farms, and they are not plain USDC loans either. Someone is allocating, hedging, setting a policy rate, or selling you a maturity. Read that row’s “where the yield comes from” cell before you treat the number as a savings rate.

If you cannot say who pays you, in one sentence, leave the deposit for later.

Why Venus and Stargate stayed off the list

Venus improved since August, and it still does not clear the bar.

Venus USDT on BNB Chain showed 3.38% current and a 3.26% 30-day average, on about $44.1 million.
Venus USDC showed 4.03% and a 3.79% 30-day average, on about $7.1 million.

The USDC rate now looks like Aave’s 30-day average. The market is a rounding error next to Aave’s $2.38 billion supplied, on a different chain. We would not take BNB Chain and Venus risk to earn a rate Aave already offers on a deeper book.

Stargate is still a bridge-liquidity product, not a like-for-like lending market. DeFiLlama’s Stargate yield set on this date was Stargate v1. The largest stablecoin pool in that set, USDC on OP Mainnet, was about $408,000 at a listed 0% APY. Nothing there belongs in a best-yield table.

These protocols can still be useful for the job they actually do. They did not earn a top slot for a general stablecoin-yield reader on 15 October 2026.

How stablecoin yield is actually generated

If you want the map of how DeFi pieces plug together, read that before stacking any of the rows below. Composability is how a USDC deposit becomes a vault, a principal token and a second chain without the ticker changing.

Yield type	Examples	What pays you	Main hidden risk
Variable lending	Aave, Fluid	Borrower interest	Utilization, bad debt, oracle and liquidation failures
Governance-set savings	Sky sUSDS	Protocol revenue and a governance-set rate	Stablecoin backing, governance and balance-sheet risk
Allocation vault	Spark spUSDC	Returns from approved venues in the Liquidity Layer	Allocation, counterparty, governance and redemption queues
Curated lending vault	Morpho, Gauntlet Prime	Borrower interest in curator-selected markets	Curator, collateral, oracle and role risk
Synthetic-dollar staking	Ethena sUSDe	Staking, futures funding/basis and liquid stables	Derivative, exchange, custody and hedge risk
Fixed maturity	Pendle PT-sUSDS	Discount converging to maturity value	Underlying asset, maturity and secondary-market liquidity
Liquidity farming	Curve USDC/RLUSD, thin incentive pools	A little trading fee, mostly reward tokens	Depeg, pool imbalance, and the reward ending

How to earn yield on stablecoins

If you want the best USDC yield you can explain

Start with Aave V3 USDC on Ethereum. Read the supply rate, utilization, available liquidity and the USDC contract. Then decide whether Fluid’s premium, on the same asset and chain, is enough to take a newer protocol and a tighter withdrawal window.

If you want a rate that sits still

Compare Spark spUSDC with Sky sUSDS. Decide whether USDS backing and Spark’s allocation layer belong in the position. Confirm which vault version you are signing, and whether your size fits in idle liquidity.

If you are comfortable delegating market selection

Open one named Morpho vault. Gauntlet USDC Prime is the one we would start with on this date. Read the curator, roles, timelock, collateral, oracles, caps, fees and allocations. Then compare the net APY with Aave, after the fee.

If the headline is the thing that caught you

Find the extra risk before you fund it. In this snapshot the usual answers are a reward token (Curve), a synthetic dollar and an unstaking delay (sUSDe), a maturity and a thin order book (Pendle), a utilization spike (Fluid), or a curator you have not read (any Morpho vault that is only a logo to you).

Stablecoin yield checklist before depositing

Verify the token contract and chain. Tickers collide, and bridged copies add a dependency.
Separate base rate from reward rate. Treat emissions as temporary. See APY versus APR if the two labels are getting mixed.
Compare the live rate with the 30-day history. Fluid is the case study this month: a real base yield, and a live print well above its average.
Check withdrawable liquidity, not only TVL. Aave had $137.7 million available. Fluid had about $8.3 million currently withdrawable.
Name the payer. Borrowers, trading fees, governance, derivatives and offchain credit fail differently.
Count every contract in the route. A vault token does not erase the markets underneath it. That is the risky side of money legos.
Review admin keys. Pauses and upgrades can limit damage in an incident, and they are also control risk.
Model a depeg or a freeze. A year of 5% does not repair a 20% principal loss. Stablecoin structure matters as much as the APY.
Subtract gas, slippage, vault fees and taxes. Steakhouse’s larger Base USDC vault showed about 3.50% net against a 4.69% gross rate, with a 25% performance fee.
Use a fresh approval and revoke it when you are done. The protocol can be fine and the wallet still compromised.

Frequently asked questions

What is the best stablecoin yield in DeFi right now?

For a straightforward default, we prefer Aave V3 USDC on Ethereum. On 15 October 2026 its supply APY was 4.20% on about $2.38 billion supplied. Fluid fUSDC paid a higher 7.96% base lending rate, well above its 5.01% 30-day average. Spark, Sky and Gauntlet USDC Prime suit readers who have already accepted their vault, governance or curator risks.

What is the best USDC yield?

The best USDC yield we would actually use as a default is Aave V3 USDC on Ethereum at 4.20%. Fluid fUSDC on Ethereum was higher at 7.96%, with about $8.3 million currently withdrawable. Gauntlet USDC Prime on Base paid 4.70% net with no performance fee. A higher USDC number that is mostly reward tokens is a farm, not a better savings rate.

What is the best stablecoin staking APY?

Sky sUSDS at 3.80% is the policy-set savings rate we would point a general reader to. Ethena sUSDe was higher at 4.89%, and it is staked synthetic-dollar exposure with derivatives venues and a seven-day unstaking period. Aave Umbrella’s extra USDC rewards are incentives, not a second savings account.

How do you earn yield on stablecoins?

You either lend them to borrowers, hold a savings or allocation vault, buy a fixed maturity, stake a synthetic dollar, or provide liquidity for trading fees and incentives. Lending on Aave is the simplest version in this guide. Each extra layer adds a payer you must be able to name before you deposit.

What is the best APY on stablecoins?

The highest mainstream lending print in this snapshot was Fluid at 7.96%, and that figure was a spike over a 5.01% 30-day average. Credit and farm markets can post higher headlines, including Pendle’s sUSDai February 2027 implied rate near 9%. The best APY on a screener is not the best risk-adjusted yield.

Is farming a stablecoin the same as lending it?

No. Lending is paid by borrowers, as on Aave and Fluid. Farming is paid mostly to occupy a pool or a campaign. Curve USDC/RLUSD showed a 4.09% total rate of which about 3.81 points were incentives and 0.28 points were trading fees. When the reward ends, the farm’s APY ends with it, and a two-asset pool can still leave you in the weaker coin.

What is the safest stablecoin yield?

No DeFi yield is risk-free or insured by default. A large single-asset lending market with a transparent yield source is easier to evaluate than a multi-protocol strategy. It still has stablecoin, contract, oracle, governance, liquidity and wallet risk. At 94% utilization, Aave USDC’s “safe default” can also be slow to exit.

Why is Fluid paying more than Aave?

Supply rates follow borrowing demand, the interest curve and how each protocol shares liquidity. On this date Fluid’s supply rate was 7.96% against a 5.01% 30-day average, while Aave was 4.20% against 3.79%. Fluid’s premium can shrink as deposits or repayments change, and Fluid asks you to accept a newer, more interconnected protocol.

Is a 5% base rate better than a 7% reward APY?

A base rate is usually more durable, because it comes from borrowers or trading fees. A reward APY depends on emissions and the reward token’s price. Base yield still does not make the protocol or the stablecoin safe. Fluid’s 7.96% base rate is a reminder that “base” can also mean “temporarily high.”

Is sUSDe a stablecoin savings account?

No. sUSDe is a staked synthetic-dollar position. The yield can include futures funding, basis, staked-asset returns and liquid-stable returns. It adds derivatives, exchange, custody, backing and withdrawal-delay risks that plain USDC lending does not have in the same form.

Is Pendle fixed yield guaranteed?

Pendle can lock the implied return in units of the underlying asset when a principal token is held to maturity. It does not guarantee the dollar value, solvency, peg or redemption of that asset. Selling before maturity takes market-liquidity risk. The October 2026 PT-USDai market used in the previous edition of this guide has matured. The November 2026 PT-sUSDS market implied 4.98% with about $4.77 million of AMM liquidity.

Can stablecoin yield positions lose principal?

Yes. Losses can come from a depeg, an issuer freeze, a contract exploit, bad debt, a bad oracle, a governance attack, a bridge failure, a derivative loss, a counterparty default, a withdrawal queue or a compromised wallet. A year of APY can be much smaller than the principal loss.

How often should stablecoin yields be reviewed?

Check the live rate, utilization, rewards and withdrawable liquidity before every deposit, and again while the position is open. Look again after a governance change, a depeg, an exploit, an oracle incident, a reward-program change or a rate that jumps away from its 30-day average.

Stablecoin yield is one place people stack DeFi money legos. Read that explainer for composability, dependency risk and the layer-2 limits. The DeFi overview covers the rest of the system, and the DeFi category lists the guides.

Sources and live data

Current protocol reads, 15 October 2026 at about 03:42 UTC:

Aave Ethereum core market, including USDC supply APY, amount supplied, utilization, optimal usage and available liquidity, from Aave’s GraphQL API (api.v3.aave.com). The DeFiLlama Aave USDC pool linked in the table is the discovery link. Its 00:02 UTC liquidity and APY print did not match Aave’s API later that morning, so it is not the figure in the table.
Fluid Ethereum fUSDC supplyRate, reward rate, total assets and withdrawable balances from https://api.fluid.instadapp.io/v2/lending/1/tokens. The 7.96% figure is that supply rate divided by 100, with a zero reward rate.
Morpho vault balances, net APY, gross APY, average net APY and performance fees from https://blue-api.morpho.org/graphql. Gauntlet USDC Prime on Base is 0xeE8F4eC5672F09119b96Ab6fB59C27E1b7e44b61.
Pendle implied APY, underlying APY and AMM liquidity for PT-sUSDS-26NOV2026 from https://api-v2.pendle.finance/core/v1/1/markets.

DeFiLlama, same morning:

30-day averages are the arithmetic mean of daily points on https://yields.llama.fi/chart/{pool} with timestamps from 15 September 2026 inclusive to 15 October 2026 exclusive.
Spark, Sky, Ethena, Curve, Venus, Aave Umbrella and the Pendle liquidity cross-check use the pool records linked in the table. Spark and Sky docs agree on the mechanism even when the two savings rates match.

Protocol docs:

Aave supply-token documentation
Spark Savings, including the distinction between Liquidity Layer vaults and the Sky Savings Rate
Morpho vault curator security considerations
Fluid
Ethena overview and risk documentation
Pendle fixed-yield documentation
USD.AI technical protocol overview

DeFiLlama is a discovery and comparison source, not proof a pool is safe. Confirm the rate, asset, contract and withdrawal rule in the protocol’s own interface before you act.