As a complicated system, the stock market includes listed companies from distinct industries. These industries can be connected as industry chains based on the relations of their product. The upstream, midstream and downstream of one industry chain are closely connected by value and information exchange. Hence, the fluctuation of a company's stock price in one link will aect those of the companies in other links. Exploring main intermediaries in the industrial chain and typical paths of stock price transmission can oer risk warnings to market participants, such as policy makers, company operators and investors. This paper combines multilayer networks and motifs to propose a new framework for studying the relationships among listed companies in dierent links of one industry chain. The results and implications are as follows: (1) There is an apparent feedback mechanism
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