沪指盘中突破3680点，券商ETF（159842）连续8日获资金净流入，机构调研券商板块热度提升

Group 1 - The Shanghai Composite Index has shown strong performance, breaking through the 3680-point mark, with the broker ETF (159842) rising by 0.35% and achieving a trading volume exceeding 30 million yuan [1] - The broker ETF has seen continuous net inflows for 8 consecutive trading days, accumulating over 230 million yuan [1] - The broker index has increased by over 15% since June 23, indicating a bullish sentiment in the market [1] Group 2 - Institutional interest in brokerages has increased, with 8 brokerages undergoing institutional research in July, compared to only 3 in the same period last year [1] - Key areas of focus for institutions include business transformation, international expansion, and specialized development [1] - The current margin trading balance is at a historical high, second only to the peak in 2015, reflecting an increase in market risk appetite [1]