Decentralized exchange Ostium has successfully raised $20 million in a Series A funding round, bringing its valuation to approximately $250 million. The round was led by General Catalyst and Jump Trading, with additional investments from Coinbase Ventures, Wintermute, and GSR. Ostium, founded by Harvard graduates, focuses on perpetual contract trading for real-world assets, aiming to offer overseas investors transparent access to the US market. The funds will be used to expand into the non-crypto user market, addressing the challenges faced by investors using traditional brokers.