What is the official stock market number? Why are different numbers published by different sources for the same capital market data such as transaction value? What number can be specified? In the twenty-first episode of in the presence of Amir Bahadad Salmi, Director of Research, Development and Islamic Studies of the Stock Exchange Organization and Ali Zarkash, CEO of the Technology Management Company of the Tehran Stock Exchange, we will examine the standardization of statistical data in the capital market from both a political and technical point of view.