China's Shanghai, Shenzhen and Beijing Bourses Implement Trading-Mechanism Rule Package on July 6

China's Shanghai, Shenzhen and Beijing stock exchanges rolled out a package of trading-mechanism optimization rules on July 6, including expanded after-hours fixed-price trading, adjusted daily price limits for the main-board ST segment, and switching Shanghai-listed fund closing-session continuous auction to call auction, according to 36Kr. The package also included supporting measures for ChiNext market makers alongside block-trade timing optimization, and adjustments to the block-trade price range for Beijing Stock Exchange stocks that have no daily price limits. After one week of operation, the market showed clearer structural shifts, including a notable rebound in ST-segment turnover, higher week-on-week block-trade volume across the market, and a sharp expansion in after-hours fixed-price trading value.