DeFi Yield Spread & Stablecoin Demand
· Updated daily
As of Apr 2026, Aave V3 USDC lending yields 4.30% against a 3-month T-bill rate of 3.61% — a DeFi spread of +0.69%, indicating a Mild DeFi Premium regime. The DeFi yield spread is a direct measure of how attractive on-chain dollar deployment is relative to risk-free government paper. When DeFi yields exceed T-bills, capital flows into stablecoin-powered lending protocols, expanding deployment and supporting total supply growth. When T-bills dominate — as they did from mid-2022 through 2023 at 5%+ — stablecoin supply contracts as off-chain yield wins. Data: Aave V3 on-chain rates (daily) and FRED TB3MS (monthly, forward-filled). From Nov 2022.
Stablecoin Supply vs DeFi & T-bill Yields
Total stablecoin market cap (left axis, green, from Jan 2018) overlaid with Aave USDC APY (right axis, blue) and 3M T-bill rate (right axis, orange dashed, from Nov 2022). Regime bands mark each Fed policy period. When blue is above orange, DeFi offers a premium over risk-free yield.
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.
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 ~$130B 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, widening the DeFi spread as on-chain rates stay elevated from crypto demand. Stablecoin supply has recovered toward new highs. A sustained DeFi premium historically correlates with accelerating stablecoin deployment into lending protocols.
Aave V3 USDC APY: Daily supply APY for USDC on Aave V3, sourced from the Aave protocol API. Represents the annualised 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. Coverage from Nov 2022.
TB3MS (3-Month T-bill rate): Secondary market yield on 3-month US Treasury bills, sourced from FRED. 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).
Limitations: Aave USDC APY is variable and can spike intraday. The daily snapshot may miss brief liquidity events. 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).