Changxin Technology has officially joined the SSE Composite Index with a weighting of 4.67 percent, making it the largest constituent. This move follows the company's listing on the STAR Market on July 27, 2026, meeting the three-month eligibility requirement for index inclusion based on its average market capitalization.
The company also entered the SSE STAR Market Composite Index, securing the top position with a 15.74 percent weighting. This adjustment aligns with the updated index compilation rules implemented by the Shanghai Stock Exchange and China Securities Index Company on October 26, which introduced a 15 percent cap on individual stock weights.
Market reaction to the inclusion was positive, with Changxin Technology shares rising over 4 percent during intraday trading on October 28. The stock has seen a cumulative increase of more than 12 percent over the past four trading sessions, supported by a broader recovery in the memory chip sector and expectations of passive capital inflows.
