Investigating the effects of investment banks index on Iran Stock Exchange price index

An investor bank is a financial organization that acts as an intermediary between the securities issuing company and the purchasing community. And since most companies are financed through the issuance of securities and this method has a significant contribution to the development of the country's financing system, the role of investment banks in the securities issuance process is very important. The main purpose of this article; Identifying the indicators of investment banks in the public and private sectors is based on the stock price index. The scope of the research is between 1390 and 1400, to collect statistical information from primary market, secondary market and financing data (Omid Capital, Amin Capital, Maskan Bank Capital, Mellat Bank Capital, Tamadon Capital, Sepehr Capital, Kardan Capital Financing, Lotus Parsian Capital Financing, Novin Capital Financing) have been used as effective indicators of investment banks and the short-term investment rate of investment banks and the stock price index. The method of analysis of this research is self-regression econometric model (panel). Using Fisher's exact test and Johansen co-integration test, static and long-run relationships of variables were examined. There is a level of 0.95 between the variables; Then, using shock analysis and analysis of variance, it was shown that among the effective indicators of investment banks (initial public offering) in public and private banks, the most impact is on the stock price index.