The Relationship between Stock Price Synchronicity and Stock Crash Risk in Tehran Stock Exchange

The managers tend to hoarding and accumulation of bad news for extended periods. The hoarding and accumulation of bad news for extended periods lead to stock price crashes when the accumulated hidden bad news crosses a tipping point, and thus comes out all at once. Theoretical literature shows that the main root of stock price synchronicity and stock crash risk is the lack of transparency of financial information. In this study, the relationship between stock price synchronicity and stock crash risk was investigated. Due to Limitations of the study, 63 listed firms of Tehran Stock Exchange, during the period 2009 to 2014 was studied. To do so, down-to-top volatility model was applied to measure stock crash risk and Also, For data review and test of the hypothesises from panel data was used. The results showed that between Stock price synchronicity and stock crash risk there was no a significant positive relationship.