[More than 80 listed companies have received institutional investigation since October] On October 12, Wind data showed that as of press time on October 11, 82 A-share listed companies had received institutional investigation since October. Judging from the survey content, investors are more concerned about the research and development progress of core products, the impact of raw material price changes on gross profit margins, and business exports. Judging from the number of surveys received by institutions, companies such as Ellis, Aerospace Nanhu, Feilihua, Taihong Wanli, and China National Heavy Duty Truck ranked top. From an industry perspective, listed companies in electrical equipment, auto parts, application software, chemicals, electronic components and other industries have received high attention from institutions. (China Securities Journal)