This paper aims to examine the impact of audit quality on stock crash risk in Tehran Stock Exchange. Down-to-up volatility (DUVOL) and whether or not experience crash month (CRASH) have been used as two criteria to measure stock crash risk. In addition. auditor industry specialization has been considered as an indicator of audit quality. https://www.roneverhart.com/VIZIO-M-SERIES-ELEVATE-5-1-2-IMMERSIVE-SOUND-BAR-WITH-DOLBY-ATMOS-AND-DTS-X/