FIFA, May 31-at a time when the A-share market is fluctuating repeatedly, both domestic and foreign institutions have conducted intensive research on listed companies in order to dig for clues to the next stage of investment. Statistics show that since May, the fund company has conducted more than 880 surveys, with machinery and equipment, medicine and computers as its key research objects. Overseas asset management giants such as Morgan assets, Goldman Sachs, Allianz Insurance and Point72 frequently appear on the research list of A-share listed companies. In the view of many institutions, the market falls into a wait-and-see state without main line in the short term. In the environment of stock game, institutions will pay more attention to the reliability of performance repair of listed companies and the safety margin of valuation.