Stablecoin Supply Drops by $7.7 Billion as Transaction Volume Hits Record Highs

Adjusted on-chain transaction volume, by contrast, reached a record $1.79 trillion over the same period. The mechanical split between shrinking supply and accelerating throughput defines the current state of stablecoin plumbing, and it points to where the digital dollar is migrating.

Supply contraction, stable pegs

CoinDesk Data, cited by Crypto News, placed total stablecoin market capitalization at roughly $312 billion at the end of June, down 2.39% from May. DefiLlama's dashboard recorded the figure near $309.9 billion on July 28, down 0.79% over 30 days. USDT remained dominant at approximately $183.9 billion; USDC stood near $73.7 billion.

The contraction ran through reduced circulating supply, not token-price collapse. Both USDT and USDC traded close to $1 through the period — no depeg event of any kind. By comparison, the 2022 Terra crisis erased $33.9 billion, nearly one-fifth of the total market, in a single quarter as UST failed. A 2.39% monthly move without a depeg is a structural drawdown, not a crisis. Within the broader picture, Crypto News reported USDS falling 16.4% and USDe declining 24.4% for the month.

Where capital rotated

Tokenized Treasury funds reached approximately $16 billion by late July, with Circle's USYC near $3 billion and BlackRock's BUIDL near $2.64 billion. Total tokenized asset capitalization rose to $30.1 billion in June. Standard payment stablecoins do not pay yield; tokenized instruments do. The GENIUS Act, signed in July 2025, explicitly prohibits payment-stablecoin issuers from offering yield, with that restriction taking effect January 18, 2027. Until the rule binds, the rotation toward yield-bearing wrappers explains the contraction on the payment side.

Visa's Allium-powered dashboard recorded $1.79 trillion in adjusted transaction volume for June, up 63% from May and 125% from June 2025. The methodology strips known bot activity, intra-exchange transfers, redundant smart-contract movements, and high-frequency wallets, but still counts exchange deposits, DEX trades, lending, mint/burn activity, and on-/off-ramp flows. USDC moved roughly $1.21 trillion despite holding less than half of USDT's circulating supply; USDT processed about $576 billion. The ratio implies USDC tokens are turning over at substantially higher velocity — heavier institutional throughput, payment settlement, or DeFi use rather than passive holding.

The divergence between shrinking aggregate supply and record token velocity mirrors a familiar pattern in equity markets, where valuations contract despite strong fundamentals, even after earnings beats.

Stress-test parameters

The pegs held; the supply base did not. If tokenized Treasuries continue absorbing marginal liquidity while GENIUS Act yield restrictions tighten toward the January 2027 enforcement date, expect the payment-stablecoin supply base to keep contracting through Q4 2026. A reversal in the Treasury-yield spread, or a regulatory clarification that permits hybrid structures, could pause the rotation. Watch USDC velocity against USDT as the read on who captures institutional throughput.