A股何时修复行情？4月21日，今日凌晨的三大重要消息持续发酵！

Group 1 - The China Securities Regulatory Commission (CSRC) has adjusted market opening arrangements, emphasizing the importance of investor protection and the development of a high-quality capital market [1] - The CSRC has implemented strict regulations on high-frequency trading, defining it as canceling 300 orders per second, which aims to curb manipulative trading practices [1] - The A-share market is influenced by quantitative funds and institutions that often exploit market gaps, leading to significant volatility and losses for retail investors [1] Group 2 - The latest performance report from Cambrian Technology is seen as a positive signal for the semiconductor sector, potentially stimulating a rally in the industry [3] - Overall market sentiment is leaning towards a favorable outlook for A-shares, with expectations of a recovery and upward movement unless unexpected negative news arises [3] Group 3 - The market performance this week has been mixed, with indices showing strength while individual stocks have struggled, indicating a fragmented market environment [5] - Despite a late rally, the Shanghai Composite Index still showed a downward trend, with a critical resistance level identified between 3300 and 3320 points [7] - The securities sector is currently positioned for a potential rebound, which could significantly support the overall index if it gains upward momentum [7]