On the morning of May 13, Beijing time, MSCI, a globally recognized index compiler, unveiled the outcomes of its May 2026 index review. This adjustment encompasses a range of indices, such as the MSCI Global Standard Index and the MSCI Global Small Cap Index, and will be implemented post-market closure on May 29. Notably, the MSCI China Index has incorporated 19 new A-share stocks, including Fiberhome Technologies, YoFC, Changxin Broad Technology, and Bio-Thera Solutions. Conversely, it has removed 16 A-share stocks, such as Roborock, Capital Securities, and China Railway Signal & Communication.

As a result of these changes, significant fluctuations were witnessed in the call auction of numerous stocks at the close of trading on May 29. Stocks like Shengyi Electronics, BIWIN Storage, AMEC, Kingsoft Office, Guanghe Technologies, and Jiangbo Long witnessed a swift surge exceeding 2%. In contrast, stocks such as O-Film Tech, Roborock, and Bull Group experienced a decline of more than 2%.