Circle (CRCL) stock surged nearly 10% on Monday, extending a three-day rally fueled by growing enthusiasm for stablecoins and supportive U.S. legislation. The stock, which has soared over 800% since its June 5 IPO, gained as much as 20% intraday following last week's Senate approval of the GENIUS Act, a bill that establishes a federal framework for stablecoins. Investor sentiment was further boosted by fintech giant Fiserv’s announcement of a new digital asset platform and stablecoin (FIUSD), which will be developed in partnership with Circle and Paxos. Analysts at Seaport Research and Innovating Capital praised Circle’s leadership role in the evolving crypto landscape, calling the company a top-tier disruptor. Circle's involvement in major deals is seen as a strong signal of growing crypto legitimacy.