Group 1 - Guojin Securities announced an adjustment to the financing margin ratio for securities, increasing it from 80% to 100% effective August 27, 2025, for all securities except those on the Beijing Stock Exchange [1][4] - The adjustment is seen as a routine risk control measure based on the company's operational situation, with no other brokers currently following suit [1][5] - The new margin ratio will apply to new financing contracts opened after August 27, while existing contracts will retain the original margin ratio [4] Group 2 - The financing margin ratio is a key risk control indicator for managing leverage in credit business, and the adjustment will reduce the maximum financing amount available to investors [4] - As of August 26, 2025, the total margin balance in the Shanghai and Shenzhen markets reached 2.207611 trillion yuan, accounting for 2.34% of the A-share circulating market value [6] - Historical data indicates that the margin balance as a percentage of A-share market value was once over 4% between May and July 2015, suggesting that current leverage levels are significantly lower than past peaks [6]