Circle Internet Financial has expanded the circulating supply of its USD-pegged stablecoin, USD Coin, by minting two separate tranches of 250 million USDC on the Solana blockchain within 24 hours, on 6 and 7 August. The transactions, disclosed by on-chain monitoring services, follow a smaller 100 million-USDC issuance earlier on 7 August. The combined 600 million new tokens, worth roughly the same amount in U.S. dollars, point to rising demand for dollar-backed liquidity in crypto markets and add to Solana’s growing share of stablecoin activity. Circle did not immediately comment on the reason for the back-to-back issuances, which account for more than 2% of the roughly 30 billion USDC in circulation. Separately, Tether Treasury moved 180 million USDT to the Bitfinex exchange on 7 August, another sizeable transfer of the market’s largest stablecoin. The fresh USDC and USDT flows come amid a pick-up in digital-asset trading volumes and could supply exchanges with additional liquidity ahead of the weekend.