This study aims to investigate the market reaction to the level of accounting disclosure of forward-looking information, and investigate the relationship between institutional ownership and average percentage change in stock prices, and investigate the market reaction to the impact of interaction between institutional ownership and the level of accounting disclosure of forward-looking information. Multiple regression model was used, first: to test the market reaction to the level of accounting disclosure of forward-looking information, second: to test the relationship between institutional ownership and average percentage change in stock prices, third: to test the market reaction to the impact of interaction between institutional ownership and the level of accounting disclosure of forward-looking information. In order to meet the objectives of this study, random sample of 60 Egyptian corporation listed in Egyptian stock exchange were selected from 10 economic sector, from 2016 up to 2019, and the results are: 1- This study found a positive market reaction to the level of accounting disclosure of forward-looking information. 2- This study found a positive relationship between institutional ownership and average percentage change in stock prices. 3- This study found a positive market reaction to the interaction between institutional ownership and the level of accounting disclosure of forward-looking information. Key words: Market Reaction, Accounting Disclosure of Forward-Looking Information, Institutional Ownership.