The stablecoin market experienced a slight decline in value and activity during the week of December 22–29, 2025, according to MetaEra's weekly report. The total market value decreased by 0.22% to $319.75 billion, while transaction volume fell by 6.20% to $1.81 trillion. Despite the overall downturn, USD1's market cap surged by 16.72% to $3.23 billion. USDT maintained its lead with a market cap of $199.08 billion, followed by USDC at $76.10 billion. The week also saw significant regulatory developments, including a leadership change at the U.S. Commodity Futures Trading Commission (CFTC) and new guidance from the Office of the Comptroller of the Currency (OCC) on risk-free crypto asset transactions.