U.S. startup Kalshi raised $300 million from Sequoia and Andreessen Horowitz, valuing it near $5 billion. The platform lets users trade outcomes on politics, weather, and macro data, bridging prediction markets with regulated exchanges. Demand surged as traders seek diversification beyond crypto. Funds will drive product launches, global expansion, and deeper regulatory engagement as authorities assess the role of event-driven contracts in mainstream finance. (Reuters)