DeFi Yield Spread & Stablecoin Demand
· Updated daily
As of Aug 2026, Aave V3 USDC lent at 3.81% against 3.73% on the 3-month US Treasury bill, a DeFi spread of +0.08%.
As of Aug 2026, Aave V3 USDC lending yields 3.81% against a 3-month T-bill rate of 3.73%, a DeFi spread of +0.08%, indicating a Mild DeFi Premium regime. The DeFi yield spread is a direct measure of how on-chain dollar yield compares to risk-free government paper. When DeFi yields exceed T-bills, on-chain deployment carries a yield premium over the risk-free alternative; when T-bills dominate, as they did from mid-2022 through 2023 at 5%+, the carry inverts. Stablecoin supply contracted alongside the inversion. BIS Working Paper 1270 (Ahmed and Aldasoro, 2025)[1] documents the inverse channel: dollar-stablecoin flows themselves measurably affect short-term Treasury yields. The IMF's Understanding Stablecoins[2] frames the broader opportunity-cost mechanism. Data: Aave V3 on-chain rates (daily) and US Federal Reserve TB3MS (monthly, forward-filled).
Stablecoin Supply vs DeFi & T-bill Yields
Total stablecoin market cap (left axis, green) overlaid with Aave USDC APY (right axis, blue) and 3M T-bill rate (right axis, orange dashed). Regime bands mark each Fed policy period. When blue is above orange, DeFi offers a premium over risk-free yield. Use the smoothing toggle above to remove intraday liquidity spikes, default is a 7-day moving average. The yield axis is capped at 20% for readability; brief single-day liquidity spikes exceed it.
DeFi Spread vs Stablecoin Market Cap
Stablecoin market cap (left axis, green) overlaid with the DeFi spread, Aave USDC APY minus 3M T-bill rate (right axis, purple). Above zero: DeFi pays a premium over risk-free yield. Below zero: T-bills outcompete DeFi. Watch how stablecoin supply tracks the sign of the spread. The spread reflects the selected smoothing window (default 7-day moving average) to remove single-day liquidity-event spikes from the Aave APY series.
With T-bills near 0%, any DeFi yield was a premium over risk-free. Aave USDC APY ranged from 2% to 15%+ during peak DeFi demand periods. Stablecoin supply grew from ~$5B to ~$180B as capital deployed into on-chain yield without competing alternatives.
As the Fed raised rates aggressively, T-bill yields crossed 4–5%. DeFi yields, driven by on-chain borrowing demand, did not keep pace as crypto market activity declined. The spread went negative. Stablecoin supply contracted from ~$180B to ~$125B as off-chain yield won.
T-bill rates held at 5%+ while DeFi yields gradually recovered as crypto activity picked up ahead of the 2024 bull market. The spread hovered near zero, a transition period before the cutting cycle reopened the DeFi premium.
Fed rate cuts reduce T-bill yields — one side of the spread — while on-chain rates follow crypto borrow demand. Stablecoin supply has recovered toward new highs. The live spread in the stat box above shows where the comparison stands today.
Aave V3 USDC APY: Daily supply APY for USDC on Aave V3, from Aave V3 on-chain data. Represents the annualized yield earned by USDC lenders. This is the largest and most liquid DeFi lending pool and serves as the benchmark for risk-adjusted on-chain dollar yield.
TB3MS (3-Month T-bill rate): Secondary market yield on 3-month US Treasury bills, sourced from the US Federal Reserve. Published monthly; forward-filled to daily for chart display. Represents the opportunity cost of deploying capital into DeFi rather than risk-free government instruments.
DeFi spread: Computed daily as Aave USDC APY minus TB3MS. Positive spread = DeFi premium (DeFi more attractive than T-bills). Negative spread = T-bill premium (risk-free yield exceeds on-chain yield).
Smoothing: Aave USDC APY is highly variable and frequently spikes intraday during liquidity events (sudden borrow demand can push utilization above 90% and rates above 30% for hours). Raw daily values make the chart noisy and misrepresent the signal. By default we apply a 7-day trailing moving average to the APY and to the derived spread, long enough to remove single-event spikes, short enough to remain responsive. Use the "Raw" toggle to inspect spike days, or "30D MA" for a structural view. The 3M T-bill rate (TB3MS) is monthly and not smoothed further.
Limitations: TB3MS is a monthly series, short-term T-bill moves within a month are not captured. The spread does not account for smart contract risk, gas costs, or the fact that T-bill yield is risk-free while Aave carries protocol risk.
Regime bands: FOMC policy period dates (Mar 2020, Mar 2022, Sep 2023, Sep 2024).
What this page does not capture: Base APY excludes incentive tokens (AAVE, COMP, ARB rewards), leveraged supply positions, and LP fee strategies, those can add 100–300 bps to the headline DeFi yield. The spread also does not account for smart-contract risk premium (implicit, unpriced) or the difference in liquidity profile (T-bills settle T+1, DeFi withdrawals are pool-utilization dependent). A "positive spread" is a necessary but not sufficient condition for DeFi deployment.
- Ahmed, Rashad, and Iñaki Aldasoro. 2025. "Stablecoins and safe asset prices." BIS Working Paper No. 1270, Bank for International Settlements, May 2025. bis.org/publ/work1270.htm
- Adrian, Tobias, Parma Bains, Marianne Bechara, et al. 2025. "Understanding Stablecoins." IMF Departmental Paper No. 2025/009, International Monetary Fund. imf.org/en/publications/departmental-papers/issues/2025/12/02/understanding-stablecoins-570602