Stablecoin market cap drops $16 billion in 10 weeks, hitting six-month low

The stablecoin market just posted its worst stretch since the Terra implosion of 2022. Total market capitalization has fallen roughly $10 billion over the past 10 weeks, sliding to a six-month low and marking the first sustained contraction the sector has seen in four years.

The numbers behind the drawdown

The stablecoin market peaked in May 2026 somewhere in the $300 billion to $316 billion range. By late July, total market cap had settled between $300 billion and $310 billion, a decline of roughly 3%. The last time stablecoins experienced a contraction this significant was May 2022, when the Terra/Luna collapse wiped out 26% of the market in a matter of days.

USDT, the dominant force in stablecoin markets, shed about $6 billion in market cap during this window, dropping from around $190 billion in May to approximately $184 billion by late July. USDC declined from a March peak near $80 billion to roughly $74 billion over the same period.

The GENIUS Act effect

The most compelling explanation for the outflow traces back to Washington. The GENIUS Act, enacted in July 2025, established a federal regulatory framework for payment stablecoins. One of its key provisions: a prohibition on yields for payment stablecoins, treating them as payment instruments rather than investment vehicles.

Tokenized Treasury products, which let investors hold on-chain representations of US government debt, have surged to around $16 billion in assets. When you can earn Treasury yields on-chain with similar liquidity characteristics, parking capital in a zero-yield stablecoin starts to look like leaving money on the table.

Usage is booming while holdings shrink

Even as market cap contracted, stablecoin transaction volumes hit record highs. June 2026 saw adjusted transaction volume reach $1.79 trillion, a sharp annual increase. This decoupling between holdings and usage suggests that stablecoins are evolving from a hybrid savings-and-spending instrument into something more purely transactional.

What this means for investors

For the broader crypto market, a shrinking stablecoin supply has historically correlated with reduced buying power on exchanges. Less dry powder sitting in USDT and USDC means less capital ready to rotate into Bitcoin, Ethereum, or altcoins on short notice. Much of the capital appears to have migrated to tokenized Treasuries and other yield-bearing on-chain products.

Tether and Circle now face a regulatory environment that explicitly prevents them from offering yield as a competitive feature under the GENIUS Act. Their moats are distribution, trust, and liquidity, not returns. That opens the door for yield-bearing alternatives to capture a growing share of on-chain dollar demand, even if those products technically fall outside the “stablecoin” classification under the GENIUS Act.

The market is stratifying: stablecoins are becoming the checking account of crypto, used for transactions and short-term settlement, while tokenized Treasuries and similar instruments are becoming the savings account. The risk to watch is whether this orderly reallocation turns disorderly—a sudden acceleration, perhaps triggered by a major issuer stumbling or a regulatory surprise, could cascade into broader liquidity concerns across DeFi protocols that rely on stablecoin deposits as collateral.