The Bank for International Settlements published Working Paper 1382 on October 13, 2026, presenting econometric evidence that reserve-backed stablecoins and US bank deposits function as partial substitutes. A 1-basis-point increase in bank deposit rates reduces stablecoin market-cap growth by app...
The Bank for International Settlements published Working Paper 1382 on October 13, 2026, presenting econometric evidence that reserve-backed stablecoins and US bank deposits function as partial substitutes. A 1-basis-point increase in bank deposit rates reduces stablecoin market-cap growth by approximately 3 percentage points over the subsequent ten weeks, rising to 9 percentage points under the study's instrumental-variable specification. The effect is statistically stronger for USDC than for USDT.
The finding lands at a critical juncture. The stablecoin market stands at $302.5 billion as of October 17, 2026, according to DefiLlama. The Federal Reserve's effective funds rate sits at 3.88%. High-yield savings accounts offer up to 4.35% APY. Meanwhile, the GENIUS Act — now law — explicitly prohibits stablecoin issuers from paying interest or yield to holders. The BIS paper quantifies what that regulatory asymmetry means in practice: when risk-free bank deposit yields cross a meaningful threshold, capital migrates out of non-yielding stablecoin balances.
Simultaneously, a companion BIS paper (Working Paper 1363, published June 2026) models the macroeconomic feedback loop. Stablecoin adoption drains retail deposits, forces banks onto costlier wholesale funding, and amplifies the Fed's monetary policy transmission through the bank lending channel. The two papers together sketch a feedback system in which deposit rates, stablecoin supply, and credit conditions are mechanically linked.
BIS Working Paper 1382, authored by Rashad Ahmed and Iñaki Aldasoro, uses weekly US data spanning January 2019 to June 2025. The dependent variable is growth in the aggregate market capitalization of reserve-backed stablecoins. The independent variable is the change in bank deposit rates, instrumented through the non-linear passthrough of policy rate changes to deposit pricing.
The baseline ordinary least squares result: a 1-basis-point deposit rate increase predicts a 3-percentage-point decline in stablecoin market-cap growth over ten weeks. The instrumental-variable specification, which addresses potential reverse causality by exploiting the asymmetric way banks pass policy rate changes through to deposit rates, yields a larger estimate of approximately 9 percentage points.
Controls include Treasury yields, exchange rate movements, Bitcoin prices, the VIX, and broader crypto market capitalization. The relationship holds after accounting for all of these factors.
The dataset captures two full Fed tightening and easing cycles — the post-COVID zero-rate environment through the 2022–2023 hiking campaign and into the 2024–2025 easing phase. The variation in deposit rates over this period is substantial, spanning effectively zero to above 5%.
The paper's most commercially significant finding is the asymmetry between the two dominant stablecoins. USDC shows a deposit-rate sensitivity of approximately -4.8% per basis point, compared with -1.9% for USDT.
The authors attribute the gap to the distinct user bases each token serves. USDC is disproportionately held by US-based institutional users and DeFi protocols operating within the US regulatory perimeter. These holders have direct access to high-yield savings accounts, money market funds, and Treasury bills — the instruments that compete most directly with non-yielding stablecoin balances.
USDT's holder base skews toward offshore markets, emerging-economy remittance corridors, and non-US exchanges. For these users, the relevant comparison is not a US savings account paying 4.35% but rather local-currency deposit rates, capital controls, and the dollar's function as a store of value. The opportunity cost of holding a non-yielding dollar token is lower when the alternative is a depreciating local currency or a deposit behind capital restrictions.
As of October 2026, USDT commands $183.4 billion in market capitalization (60.7% share) versus USDC's $72.7 billion (24% share). USDT's 30-day market-cap change is +0.09%; USDC's is -1.43%. The BIS data is consistent with this divergence.
The paper identifies a structural break at approximately 3% on the federal funds rate. Below that level, the substitution effect is statistically weak. Both bank deposits and stablecoins effectively pay zero, so there is no meaningful opportunity cost to holding either.
Above 3%, the rate gap becomes economically significant. A high-yield savings account paying 4.35% generates $4,350 annually on a $100,000 balance. A USDC balance of equivalent size generates zero direct yield. The difference is not abstract — it is $362.50 per month in foregone income.
This nonlinearity has policy timing implications. The current effective federal funds rate is 3.88%, per Federal Reserve H.15 data as of October 16, 2026. That places the market firmly in the zone where deposit rate competition bites. The next FOMC decision is scheduled for October 27–28, 2026. Any hold or increase at that meeting maintains or intensifies the competitive pressure on non-yielding stablecoin balances.
The competitive dynamics the BIS paper identifies are not merely market-driven. They are reinforced by regulation.
The GENIUS Act (P.L. 119-27), enacted in July 2025, prohibits permitted payment stablecoin issuers from paying "interest or yield solely in connection with the holding, use, or retention of payment stablecoins." The Federal Reserve's September 24, 2026, notice of proposed rulemaking carries this prohibition into binding regulatory text.
The practical effect: Tether, Circle, and any future GENIUS-compliant issuer cannot respond to the BIS-documented substitution effect by offering deposit-competitive yields. The one lever that could neutralize the rate gap — passing reserve income through to holders — is legally unavailable.
Circle's economics illustrate the scale of captured income. As reported in the company's public filings, Circle generates approximately 7 cents of net revenue per dollar of USDC in circulation, primarily from investing reserves in Treasury bills and similar short-duration instruments. On $72.7 billion in USDC outstanding, reserve income at current rates is substantial. None of it reaches USDC holders.
Yield-bearing stablecoin alternatives exist outside the GENIUS framework. Sky Protocol's sUSDS pays approximately 3.6% APY on $6.6 billion in circulating supply, generated from Treasury-bill RWA portfolios and overcollateralized lending. Aave v4's USDC lending market pays 5–6% variable yield. But these are DeFi protocol yields requiring active participation and smart-contract risk, not passive stablecoin interest.
BIS Working Paper 1363, published June 23, 2026, by Boris Hofmann, Matthias Kaldorf, and Matthias Rottner, builds a quantitative macro model calibrated to the US economy. The model traces a transmission chain:
The paper concludes that stablecoin adoption "strengthens the transmission of monetary policy through the bank lending channel." In practical terms, the $302 billion stablecoin market is not neutral to monetary policy — it amplifies it.
This creates a paradox. The same high interest rates that the BIS Working Paper 1382 shows slow stablecoin growth are, according to Working Paper 1363, made more potent by the stablecoin market's existence. The system contains a self-moderating mechanism: stablecoins amplify tightening, tightening slows stablecoin growth, which reduces the amplification.
The stablecoin market has plateaued. After growing from $206 billion at year-end 2024 to $308 billion at year-end 2025 (a 50% increase), the market peaked near $322 billion in May 2026 and has since contracted to $302.5 billion — a 6% decline from the peak.
The contraction coincides precisely with the period the BIS model predicts would see the strongest substitution effect. The federal funds rate has been above 3% since mid-2025. High-yield deposit accounts are widely available at 4%+ APY. The rate differential between a deposit and a stablecoin has widened.
Broader crypto market conditions reinforce the pattern. US spot Bitcoin ETFs recorded $681 million in outflows during the week of October 5–9, followed by $228.4 million the week of October 12–16. Ethereum ETFs lost $542 million and $320.1 million in those respective weeks. Combined crypto ETF outflows across all categories reached $1.29 billion in the first week and $610.7 million in the second. The macro repricing is not limited to stablecoins.
Stablecoin payment volume remains robust. Non-trading payment flows reached approximately $390 billion in 2025, doubling from the prior year, with B2B cross-border payments as the fastest-growing segment. This suggests the functional utility of stablecoins as payment rails persists even as the store-of-value proposition weakens relative to deposits.
The BIS findings create distinct strategic pressures across the stablecoin value chain.
For Tether: The lower rate sensitivity (-1.9% vs. -4.8%) is a structural advantage. Tether's offshore, emerging-market user base is partially insulated from US deposit rate competition. The company's growth increasingly depends on non-US corridors where dollar access, not yield, is the primary value proposition.
For Circle: The higher sensitivity compounds existing challenges. USDC's 30-day market-cap decline of -1.43% is consistent with the BIS mechanism. Circle's pending IPO valuation depends on maintaining or growing USDC supply; the BIS data implies that supply is mechanically tied to Fed rate decisions outside Circle's control.
For DeFi lending protocols: The GENIUS Act's no-yield prohibition creates an indirect subsidy for DeFi lending markets. Users seeking yield on stablecoin balances must move capital from passive holding into active DeFi strategies — Aave, Compound, Morpho, and similar protocols. The rate gap between a stablecoin (0% passive yield) and a lending protocol (4–6% variable) is the economic force driving this migration. As long as the GENIUS Act's prohibition holds and rates stay above 3%, DeFi lending protocols capture the yield-seeking demand that stablecoin issuers cannot serve.
For banks: The BIS paper validates that deposit rate pricing is an effective competitive tool against stablecoins. Banks do not need to launch their own stablecoins to compete — they can simply raise deposit rates. The average FDIC-reported savings rate of 0.37% understates the competitive landscape, as online banks now offer 4%+ APY, but the research suggests that even modest rate increases at scale slow stablecoin capital formation.
The BIS has quantified a relationship that market participants have intuited but lacked rigorous evidence for: stablecoins compete with bank deposits, and deposits are winning when they pay more. The $302.5 billion stablecoin market is not collapsing, but its growth has stalled precisely when the model predicts it should. The 6% contraction from the May peak tracks the rate environment.
The regulatory overlay makes the finding more consequential than a pure market observation. The GENIUS Act prevents issuers from offering yield, ensuring the rate gap persists as long as the Fed maintains restrictive policy. This is not an oversight — Congress explicitly chose to preserve the deposit franchise by prohibiting stablecoin interest payments.
For the stablecoin market, the implication is that future growth depends more on the Fed's rate path than on any product innovation, regulatory approval, or adoption campaign. If rates fall below 3%, the substitution effect weakens and growth resumes. If rates hold at current levels or rise, the competitive drain continues. The $302 billion stablecoin market is, in quantifiable terms, a rate-sensitive instrument — and the BIS has now shown exactly how sensitive it is.