CryptoSlate
A Federal Reserve staff paper dated June 2, 2026, and updated August 31, 2026, models how transaction congestion on public blockchains can destabilize even a perfectly backed stablecoin. The framework strips out reserve risk entirely and focuses on the interaction between gas fees and payment network effects, finding a threshold where weak usage incentives turn individual exits into coordinated redemptions. The authors worked from an unbalanced weekly panel of five stablecoins from November 2017 through December 2025, plus 1,230 matched Ethereum-Tron USDT transfers from May 2020 through December 2025. In the 2021 through 2025 subset, fee-to-value ratios at the 75th percentile routinely exceeded 100% for below-median USDC transfers while staying under 5% for above-median ones.
Why it matters
The GENIUS Act requires permitted payment stablecoin issuers to hold reserves at least one-to-one in specified liquid assets, disclose purchase and redemption fees, and submit to monthly reporting, examination, and certification. Treasury's August 17 implementation proposal targets section 3's restrictions on offering payment stablecoins in the United States, with comments due October 19 and an expected effective date of January 18, 2027 for issuer licensing. None of that touches the price or capacity of the public chain that actually moves the token. The law gives regulators broad authority over an issuer's operations while leaving blockspace economics untouched. The paper turns that gap into a monitorable risk rather than evidence of an imminent event, sharpening the question Treasury now has to answer: is reserve quality the full definition of safety?
Market impact
A DefiLlama snapshot taken shortly before drafting put stablecoin supply near $147.3 billion on Ethereum, $93.2 billion on Tron, and $15.7 billion on Solana. Ethereum gas sat near 0.127 to 0.128 gwei at ETH around $2,404, implying a roughly two-cent cost for an illustrative 65,000-gas ERC-20 transfer. Calm fees in the snapshot hide the structural risk the paper flags: in expensive periods, a representative network fee can exceed the value of many small transfers, rationing access by transaction size. The first direct pressure falls on small self-custody users, who can delay, batch, route through custodians, or move off the chain. Larger intermediaries with enough liquidity to shift chain-level balances tend to move next. Destination chains inherit both the activity and the strain, deepening their stablecoin liquidity while testing the rebalancers and bridges that follow.
Frequently asked questions
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What does the GENIUS Act require of stablecoin issuers?
The act requires permitted payment stablecoin issuers to hold reserves at least one-to-one in specified liquid assets, disclose purchase and redemption fees, and submit to monthly reporting, examination, and certification. Treasury's August 17 implementation proposal targets section 3's offering restrictions, with…
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How can a fully-backed stablecoin still face a 'run'?
The Fed paper isolates congestion risk from reserve risk. When gas fees climb high enough, small transfers become uneconomic, weakening the token's payment network. Under that state, individual holders can coordinate exits even though the issuer's dollar claim remains pristine.
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What did the Federal Reserve paper find empirically?
Using a weekly panel of five stablecoins from November 2017 through December 2025, the authors found a one-standard-deviation, $10.83 gas increase raised weekly redemptions by about 0.9 percentage points when network effects were weak, a state covering 7-7.5% of observations.
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Does the paper predict an imminent stablecoin crisis?
No. The paper presents a latent mechanism and historical associations, not a forecast. It sharpens a question for Treasury as it implements GENIUS: reserve quality alone does not guarantee access to the dollar claim if the underlying chain is congested.
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What signals should regulators watch for congestion-driven runs?
The paper points to four monitorable indicators: fee-to-value ratios by transfer size, abrupt shifts in chain-level stablecoin circulation, matched cross-chain flows, and exchange wallet imbalances. These flag rail stress even when issuer reserves remain sound.
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