How Interest Rate Cuts Affect Stablecoin Yields and Mixed Treasury Products
The Fed’s September 2025 rate cut compresses yields on stablecoins and tokenised Treasuries. Yet, inflows continue to rise as institutions adopt these instruments as strategic liquidity tools, reinforcing their role in the digital financial ecosystem.
✳ STRATEGIC DISPATCH / cache256 intelligence
How Interest Rate Cuts Affect Stablecoin Yields and Mixed Treasury Products
17 September 2025
In a pivotal decision, the U.S. Federal Reserve announced a 25 basis point (bps) cut to its benchmark interest rate on September 17, 2025, adjusting the federal funds rate to a range of 4.00%–4.25%. This action follows earlier easing, including a 50 bps reduction in September 2024, and is driven by cooling inflation and a softening labour market, aiming to support growth amid economic uncertainties.
While rate cuts benefit borrowers and boost risk assets like stocks and cryptocurrencies, they compress yields on low-risk instruments, including those underpinning stablecoins and tokenised treasuries. Stablecoins, now totalling around $172 billion in market capitalisation as of September 2025, form the bedrock of DeFi with yields derived from lending or Treasury-backed reserves.
Mixed treasury products, such as tokenised U.S. government securities from providers like BlackRock's BUIDL or Ondo Finance, blend stablecoins with short-term bonds for on-chain yields. As rates decline, these products face downward pressure on returns, though surging demand often tempers the impact.
The Mechanics of Interest Rate Cuts in Traditional Finance
Fed rate cuts reduce short-term borrowing costs, flooding markets with liquidity and spurring investment. In fixed-income markets, lower rates inversely push down yields on new U.S. Treasuries, as investors accept less return for safety.
The 3-month Treasury bill yield, for instance, stood at approximately 3.98% immediately following the September 2025 cut, down from around 4.06% pre-announcement and significantly lower than 4.96% a year prior.
Historical trends indicate Treasury yields can fall 100–200 bps over 12–18 months in easing cycles. In the current environment—post-2024 election stability and ongoing cuts—projections suggest further declines, potentially to 3.5%–3.8% by Q1 2026.
Stablecoin Yields: How They Work and Why Rates Matter
Stablecoins like USDC and USDT peg to $1 via reserves in cash equivalents, including Treasuries and repos. Issuers invest these for yield, distributing portions to users via DeFi platforms like Aave or Compound. Current yields hover at 4%–5%, tracking short-term Treasury rates net of fees.
In tightening phases, yields spiked to 8%–10% in 2023. Cuts reverse this: Post-September 2025 announcement, USDC supply APY on Aave fell to about 4.44%, from 4.64% earlier in the month.
A BIS working paper confirms stablecoins' influence: Inflows of $3.5 billion (a 2-standard deviation move) depress 3-month Treasury yields by 2–2.5 bps within 10 days, with outflows amplifying effects up to 5 bps — creating a self-reinforcing loop where lower rates drive more stablecoin adoption.
Issuer profits, reliant on interest, could shrink notably if rates near zero, echoing pre-2022 lows.
The Direct Impact: Yield Compression Offset by Inflows
Cuts directly erode stablecoin yields, but demand surges provide a counterbalance. Following the 2025 cut, DeFi stablecoin lending rates adjusted downward, yet monthly inflows are projected at $7–8 billion, up from $5 billion pre-cut, as investors flee sub-3% bank savings.
Stablecoin market cap has grown 1.5% month-over-month to $172 billion, marking 12 straight increases.
Run risks persist, with BIS estimating 3%–4% annual probability for major stablecoins—higher than traditional banks—especially in low-yield chases. Favour overcollateralised platforms for safety.
Data from DeFiLlama, Fed releases, and BIS models; yields verified via Aave analytics.
Mixed Treasury Products: Tokenisation's Staying Power
Tokenised treasuries, merging stablecoins with on-chain U.S. bonds, boast yields of 4%–5% and have exploded to $5.6 billion in market cap by late 2024, with projections exceeding $8 billion by Q3 2025.
Rate cuts trim these returns—new T-bills yield 20–50 bps less post-cut—but tokenisation's efficiency draws institutions fleeing low bank rates.
Stablecoins buffer volatility: Their demand could absorb $10–20 billion in Treasuries, steadying yields. Goldman Sachs anticipates RWA TVL reaching $150 billion amid three more cuts in 2025–2026, fuelled by pro-crypto policies.
Broader Implications for Investors and the Crypto Ecosystem
Investors should shift toward liquidity and efficiency: Stablecoin users may explore yield farming, amplifying DeFi growth but risks. Tokenised treasuries emerge as "digital cash," challenging banks.
Post-cut, Bitcoin rallied over 3% to above $61,000, highlighting stablecoins' liquidity role. Regulatory scrutiny intensifies, with potential stablecoin yield caps, but a clear U.S. framework could boost Treasury uptake.
As easing persists, yields face pressure—but innovation and inflows offer resilience.
Adaptability yields the true returns.
How Interest Rate Cuts Affect Stablecoin Yields and Mixed Treasury Products
17 September 2025
In a pivotal decision, the U.S. Federal Reserve announced a 25 basis point (bps) cut to its benchmark interest rate on September 17, 2025, adjusting the federal funds rate to a range of 4.00%–4.25%. This action follows earlier easing, including a 50 bps reduction in September 2024, and is driven by cooling inflation and a softening labour market, aiming to support growth amid economic uncertainties.
While rate cuts benefit borrowers and boost risk assets like stocks and cryptocurrencies, they compress yields on low-risk instruments, including those underpinning stablecoins and tokenised treasuries. Stablecoins, now totalling around $172 billion in market capitalisation as of September 2025, form the bedrock of DeFi with yields derived from lending or Treasury-backed reserves.
Mixed treasury products, such as tokenised U.S. government securities from providers like BlackRock's BUIDL or Ondo Finance, blend stablecoins with short-term bonds for on-chain yields. As rates decline, these products face downward pressure on returns, though surging demand often tempers the impact.
The Mechanics of Interest Rate Cuts in Traditional Finance
Fed rate cuts reduce short-term borrowing costs, flooding markets with liquidity and spurring investment. In fixed-income markets, lower rates inversely push down yields on new U.S. Treasuries, as investors accept less return for safety.
The 3-month Treasury bill yield, for instance, stood at approximately 3.98% immediately following the September 2025 cut, down from around 4.06% pre-announcement and significantly lower than 4.96% a year prior.
Historical trends indicate Treasury yields can fall 100–200 bps over 12–18 months in easing cycles. In the current environment—post-2024 election stability and ongoing cuts—projections suggest further declines, potentially to 3.5%–3.8% by Q1 2026.
Stablecoin Yields: How They Work and Why Rates Matter
Stablecoins like USDC and USDT peg to $1 via reserves in cash equivalents, including Treasuries and repos. Issuers invest these for yield, distributing portions to users via DeFi platforms like Aave or Compound. Current yields hover at 4%–5%, tracking short-term Treasury rates net of fees.
In tightening phases, yields spiked to 8%–10% in 2023. Cuts reverse this: Post-September 2025 announcement, USDC supply APY on Aave fell to about 4.44%, from 4.64% earlier in the month.
A BIS working paper confirms stablecoins' influence: Inflows of $3.5 billion (a 2-standard deviation move) depress 3-month Treasury yields by 2–2.5 bps within 10 days, with outflows amplifying effects up to 5 bps — creating a self-reinforcing loop where lower rates drive more stablecoin adoption.
Issuer profits, reliant on interest, could shrink notably if rates near zero, echoing pre-2022 lows.
The Direct Impact: Yield Compression Offset by Inflows
Cuts directly erode stablecoin yields, but demand surges provide a counterbalance. Following the 2025 cut, DeFi stablecoin lending rates adjusted downward, yet monthly inflows are projected at $7–8 billion, up from $5 billion pre-cut, as investors flee sub-3% bank savings.
Stablecoin market cap has grown 1.5% month-over-month to $172 billion, marking 12 straight increases.
Run risks persist, with BIS estimating 3%–4% annual probability for major stablecoins—higher than traditional banks—especially in low-yield chases. Favour overcollateralised platforms for safety.
| Factor | Pre-Cut (Aug 2025) | Post-25 bps Cut (Sept 2025) | Projected Q1 2026 |
|---|---|---|---|
| 3-Month T-Bill Yield | 4.06% | 3.98% | 3.5%–3.8% |
| USDC Lending Yield (Aave) | 4.64% | 4.44% | 3.8%–4.0% |
| Stablecoin Inflows | $5B | $7B+ | $8B–10B |
| DeFi TVL Growth | +8% YoY | +12% YoY | +15%–20% YoY |
Mixed Treasury Products: Tokenisation's Staying Power
Tokenised treasuries, merging stablecoins with on-chain U.S. bonds, boast yields of 4%–5% and have exploded to $5.6 billion in market cap by late 2024, with projections exceeding $8 billion by Q3 2025.
Rate cuts trim these returns—new T-bills yield 20–50 bps less post-cut—but tokenisation's efficiency draws institutions fleeing low bank rates.
Stablecoins buffer volatility: Their demand could absorb $10–20 billion in Treasuries, steadying yields. Goldman Sachs anticipates RWA TVL reaching $150 billion amid three more cuts in 2025–2026, fuelled by pro-crypto policies.
Broader Implications for Investors and the Crypto Ecosystem
Investors should shift toward liquidity and efficiency: Stablecoin users may explore yield farming, amplifying DeFi growth but risks. Tokenised treasuries emerge as "digital cash," challenging banks.
Post-cut, Bitcoin rallied over 3% to above $61,000, highlighting stablecoins' liquidity role. Regulatory scrutiny intensifies, with potential stablecoin yield caps, but a clear U.S. framework could boost Treasury uptake.
As easing persists, yields face pressure—but innovation and inflows offer resilience.
Adaptability yields the true returns.
— James Blake / cache256.com / Strategic Intelligence Unit
Strategic intelligence. Not financial advice. You are sovereign.
Strategic intelligence. Not financial advice. You are sovereign.