Soros (1985) considers that because investors can only pay a limited amount of attention to the market, they cannot obtain comprehensive market information. This limitation results in dissimilar market awareness and different market expectations among investors, which can consequently lead to investment biases. Therefore, when investment biases in the market grow, market prices deviate from the fundamental value, engendering a stock price bubble. The present study investigates the effects of limited investor attention on stock price bubbles. The empirical results reveal that stock price bubbles decrease when investors’ attention levels increase. The effects of firm leverage, institutional ownership, firm size, and liquidity on stock price bubbles differ according to proxy variables.