# stock exchange interventions

China's Exchanges Clamp Down as A‑Shares Rally Cools: 800+ Interventions and a Return to Macroprudence

China's securities regulator and stock exchanges have tightened market controls after a rapid A‑share rally, executing more than 800 supervisory actions in a week and raising the minimum margin requirement for new financing contracts from 80% to 100%. The moves aim to curb speculative leverage and steer the market toward longer‑term institutional investors while preserving orderly trading.