Prediction markets have emerged as an unlikely engine of viral misinformation, pumping out false, misleading and context-free claims to millions of people on social media. Why it matters: Once a niche corner of crypto and gambling cultures, these platforms have rapidly become a central force in how politics, media and global crises are understood in real time. - Kalshi and Polymarket, the two dominant prediction markets, have pushed deep into the mainstream , striking a vast web of media , sports and influencer partnerships as their valuations have soared. - The problem: Their social media accounts face few of the rules or norms that govern journalism, even as their posts can spread faster — and reach farther — than verified…