The current study aimed to study the relationship between the explanatory power of accounting information and the average rate of stock price change. This was achieved by testing the impact of the book value per share and the average rate of stock price change for Egyptian joint-stock companies. It also tested the impact of the gross operating income ratio on the average rate of stock price change for Egyptian joint-stock companies. It also tested the impact of the net -profit ratio on the average rate of stock price change for Egyptian joint-stock companies. It also tested the impact of the operating cash flow ratio on the average rate of stock price change. Finally, it tested the impact of the capital expenditure ratio on the average rate of stock price change. The current study relied on a multiple regression model to test the previously mentioned relationships for a sample of joint-stock companies listed on the Egyptian Stock Exchange, representing 100 companies representing 10 different economic sectors, for the period from 2022 to 2023. The study found a significant positive impact between the book value per share and the average rate of stock price change for Egyptian joint-stock companies.