Relationship Between On-Chain Stablecoin Rate Changes and the Crypto Market
In mid-March, the USDC deposit rate on Aave V3 fell below 2%.
If you experienced the tail end of DeFi Summer in 2024, seeing this number probably gives you pause. Back then, many people were earning annualized yields of 8% or even double digits by depositing USDC on Aave. Now it's under 2%.
During the same period, the yield on 10-year US Treasury bonds was above 4.24%.
In other words, holding US dollar stablecoins on-chain earns you over two percentage points less than buying US Treasuries. This was unimaginable three years ago – on-chain deposit rates were typically several times higher than traditional interest rates.
Behind this number is not just the fact that "yields are low." It reflects some structural changes happening in the entire crypto market.
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Why Did the Rate Drop Below 2%?
The core reason is simple: there's too much money, but not enough borrowers.
Since 2024, the total market cap of stablecoins has risen from under $130 billion to over $310 billion, an increase of about 55%. A large portion of these newly minted stablecoins has flowed into lending protocols like Aave, seeking to earn yield.
The problem is, borrowers haven't kept up.
Aave's Total Value Locked (TVL) stands at a massive $42.5 billion, but only $16.3 billion of that has actually been lent out. Over 60% of deposited assets are sitting idle in the pool, with no one borrowing them, naturally driving rates down.
Interest rates are the price of money. Oversupply means the price drops. It's not complicated.
Arbitrage Demand Has "Fizzled Out"
In the past, a significant portion of on-chain stablecoin borrowing demand came from arbitrage trading.
The perpetual futures market has something called a "funding rate" – when the market is heavily long, longs pay a fee to shorts every 8 hours. The classic arbitrage play is: borrow stablecoins to buy spot Bitcoin, simultaneously open a short position in the futures market, and earn this funding rate.
This strategy was a major pillar of on-chain stablecoin borrowing demand over the past two to three years.
But it's not working now. Funding rates for BTC and ETH have frequently turned negative or become extremely low, squeezing arbitrage opportunities to nearly zero. Without arbitrage demand, stablecoin borrowing volume has collapsed.
Another demand line – looping – is also shrinking.
A typical looping strategy involves: depositing sUSDe (a yield-bearing stablecoin) on Aave, borrowing USDC, swapping the USDC back to sUSDe, and depositing it again, stacking several layers.
For this strategy to work, the yield on sUSDe must be significantly higher than the borrowing cost. Previously, sUSDe yields exceeded 30% while borrowing costs were around 10%, creating a spread of 20 percentage points. But now that spread has nearly vanished, and the total size of sUSDe has dropped from nearly $15 billion to $6 billion.
This is a negative feedback loop: Demand shrinks → Rates fall → Demand shrinks further.
RWAs Have Raised the "Interest Rate Floor"
However, one category of protocol in this market is performing differently.
Sky (formerly MakerDAO) holds $1.5 billion in RWA assets – primarily things like US Treasuries and corporate bonds. These assets are unaffected by crypto market volatility and generate stable returns.
Currently, the sUSDS (Sky's interest-bearing stablecoin) rate is maintained around 3.75%, acting as a "floor price" for on-chain yields. When depositing USDC on Aave yields less than 2%, Sky can still offer 3.75%.
This draws a line for the market: if the yield generated internally on-chain falls below this number, capital will shift towards RWAs.
What Conditions Are Needed for Rates to Recover?
The on-chain lending market has its cyclical pattern: low rates cause capital to leave, supply contracts; rates recover, capital flows back in; then oversupply pushes rates down again, and the cycle repeats.
The current problem is that we are in the fourth phase – rates are too low, and capital is leaving.
For rates to recover, either borrowing demand needs to pick up again, or the supply of funds needs to decrease.
What does the demand side need? New collateral asset classes, more flexible loan structures, and improvements in infrastructure like compliant custody. Simply put, we need more people willing to borrow money on-chain, not just deposit it.
Another possible direction is that the regulatory battle over stablecoin interest could reshape the landscape. US banks are lobbying Congress, trying to block channels for paying interest on stablecoins. If successful, this could significantly alter the supply dynamics of on-chain stablecoins.
What This Means for You
If you're just depositing stablecoins in lending protocols to earn interest, now might not be the best time. Depositing USDC on Aave yields less than 2%, while you can get nearly 4.5% risk-free in traditional financial markets.
But if you're a borrower, the current rate environment is favorable. Low-cost capital is suitable for building strategic leveraged positions.
A more important signal is this: low rates are often a prelude to a major cycle shift.
After on-chain rates bottomed out in 2023, the boom of 2024 followed. Will history repeat itself? No one can guarantee it, but before a rate inflection point appears, there are often signs – like the launch of new collateral asset classes, or a new protocol bringing structural demand changes.
The on-chain stablecoin rate isn't just a number; it's the thermometer for the entire DeFi market. Understanding its changes can at least help you sense the market's direction half a step ahead of others.
FAQ - Frequently Asked Questions
Q: Why can on-chain stablecoin rates fall lower than US Treasuries?
A: Because the demand for on-chain stablecoin borrowing primarily comes from arbitrage and leverage within the crypto market itself, and this demand has been shrinking since the second half of 2025. Meanwhile, the supply of stablecoins has increased significantly. The result of oversupply is that rates are pushed very low.
Q: What are RWAs, and how do they relate to on-chain rates?
A: RWA stands for Real World Assets. In the context of stablecoins, it mainly refers to traditional financial assets like US Treasuries and corporate bonds. Protocols like MakerDAO package RWA assets on-chain, providing yields to users who deposit stablecoins. Because these yields come from off-chain sources and are unaffected by crypto market volatility, they act as a "floor price" for on-chain rates.
Q: Does depositing stablecoins still make sense in a low-rate environment?
A: From a pure yield perspective, on-chain deposit rates are currently indeed lower than US Treasuries. However, if you value the flexibility and immediate accessibility of on-chain funds – the ability to withdraw anytime, quickly convert to other assets, or participate in new DeFi opportunities – then on-chain stablecoins still have their use cases. The key is knowing you are paying an opportunity cost for liquidity.
Q: Where might rates go next?
A: It depends on two variables: first, whether borrowing demand recovers (e.g., new collateral types emerge, compliant infrastructure improves), and second, whether stablecoin supply contracts. The on-chain lending market has cyclical patterns – when rates get low enough, capital leaves, and the supply contraction can push rates back up. An inflection point may appear when a substantive demand catalyst emerges.
