China's video-game curbs shock stocks

China's raft of new measures limiting players' spending on video games sent ripples through stock markets globally. Prosus and Naspers slumped in Amsterdam and Johannesburg due to the regulator's draft rules, impacting their holdings in Tencent. The Nasdaq Golden Dragon China Index declined, with NetEase leading losses. Ubisoft and Unity Software also fell. China's gaming regulator published draft rules targeting practices that encourage excessive spending in online games, sparking fears of an industry crackdown. Prosus's sensitivity to factors beyond its control, such as its Tencent stake, is evident in its stock performance.