Zahra Amirhosseini - DEPARTMENT OF MANAGEMENT, SHAHR-E-QODS BRANCH, ISLAMIC AZAD UNIVERSIYU
Sadegh Hadipour - Department of Accounting, Shahr-e- Qods Branch, Islamic Azad University, Tehran, Iran

This research studies the companies’ effectiveness and performance relationship with stock market liquidity in Tehran Stock Exchange during ۲۰۱۰-۲۰۱۵. Simultaneously, in the study, the three indicators: return on assets, return on investment and Tobin's Q ratio were applied as a measure of the performance and bid-ask spread as a measure of liquidity, bid-ask spread to the stock market. This research has a practical purpose and descriptive correlation in research nature and also post-event research. The under study population comprises all companies accepted in Tehran Stock Exchange during the intended period, ۱۹۸ companies selected with systematic elimination sampling to be studied and analyzed. The results show a positive and significant association between companies’ performance and Stock market liquidity.

Company&#۰۳۹;s performance, Return on assets, Return on equity, Tobin&#۰۳۹;s Q ratio, Bid-ask spread