Tether USDT Market Cap Nears $190 Billion Milestone

Supply concentration and collateralization

• USDT market capitalization: ~$190 billion (June 2026)

• USDC market capitalization: ~$75 billion

• Combined dominance in exchange pairs, DeFi lending markets, and payment settlement rails

• USDC trades at $0.9997; USDT at $0.9985 — minor peg variance, no visible depegging event

Tether's supply growth continues to outpace Circle's by a factor of roughly 2.5x. Network effects in trading pairs and on-chain lending markets reinforce the gap. Fiat-backed structure remains the core collateral model: cash and short-dated government securities on the asset side, tokenized dollar on the liability side.

Regulatory plumbing shifts

The Bank of England published a draft Code of Practice for systemic stablecoins on June 22. Key parameters:

• Per-coin issuance guardrail: £40 billion

• Interest-bearing backing asset allowance: raised from 60% to 70% of reserves

• Previous proposal of individual holding caps has been removed

The revision lowers the friction cost for institutional issuers operating in the UK settlement layer. Raising the permitted share of yield-generating reserves directly increases revenue potential for compliant issuers, while shifting the risk profile of the backing portfolio toward duration exposure. This is a structural change in the reserve composition rules, not a peg event.

Liquidity delta and what to track

• The $190 billion USDT figure should be cross-referenced against Tether's attestation reports for reserve composition and treasury bill duration.

• The BoE's 70% interest-bearing allowance is a ceiling, not a floor — actual issuer allocation remains to be disclosed.

• The GENIUS Act (US) and MiCA (EU) continue to define reserve quality and disclosure standards outside the UK framework.

• Yield-bearing alternatives such as USDe operate in a separate regulatory bucket under MiCA and do not directly compete with USDT/USDC on payment rails.

Systemic impact is neutral-to-positive for liquidity depth. The risk vector is duration: a higher permitted share of interest-bearing reserves ties stablecoin solvency to the front end of the sovereign yield curve. Watch the next attestation cycle.