超3400只个股下跌，A股沪指收盘微跌

Market Overview - The A-share market opened lower on the 30th but experienced fluctuations, with indices turning positive multiple times during the session [1] - By the end of the trading day, the Shanghai Composite Index slightly declined to 3965.12 points, while the Shenzhen Component Index rose by 0.49% and the ChiNext Index increased by 0.63% [1][2] Trading Data - The total trading volume in the market reached 2.16 trillion yuan, with over 3400 stocks experiencing declines [3] - The Shanghai Composite Index recorded a minor decrease of 0.16%, while the Shenzhen Component Index gained 66.97 points, reflecting a 0.49% increase [2] - The ChiNext Index saw an increase of 20.29 points, or 0.63%, indicating positive momentum in certain sectors [2] Sector Performance - Human robot concept stocks surged in the afternoon, while sectors related to digital currency, AI smartphones, and short drama games showed active performance [3] - Conversely, the photovoltaic industry chain experienced a pullback, and stocks related to the Hainan Free Trade Zone, outbound tax refunds, and commercial aerospace concepts underwent adjustments [3]