A股三大股指午后下挫，沪指转跌，深证成指跌超1%，创业板指跌近2%。

Core Viewpoint - The A-share market experienced a decline in the afternoon session, with the Shanghai Composite Index turning negative, the Shenzhen Component Index dropping over 1%, and the ChiNext Index falling nearly 2% [1] Group 1 - The Shanghai Composite Index turned negative in the afternoon session [1] - The Shenzhen Component Index fell by more than 1% [1] - The ChiNext Index experienced a decline of nearly 2% [1]