We hypothesize that high stock price levels impede informed trading on the stocks and reduce price informativeness. This is because uninformed trading is needed to facilitate informed trading, and high stock prices may impose budget constraints on uninformed investors. Indeed, we find, for high-price firms, (i) options to stock trading volume (O/S), an informed trading measure in options market, is higher, (ii) price informativeness about future earnings is lower, and (iii) investment sensitivity to price is lower. We also find these patterns reverse after stock splits, suggesting that firms can use splits to improve informed trading and enhance price informativeness.

We propose that firms use stock splits as a means of attracting attention and inducing information production to correct price distortion caused by investors’ 52-week high anchoring bias. Our analysis shows that firms are more likely to split stocks when their prices are near 52-week highs, especially if they are highly profitable and undervalued. After splits, undervaluation gradually disappears. Moreover, these splits are associated with a slower market reaction and a more positive post-split drift, consistent with the notion that investors’ anchoring bias hinders price adjustment, leading to a gradual price correction. In addition, the likelihood of such splits increases with CEO wealth-performance sensitivity, and investment-price sensitivity increases following splits. Our evidence suggests that firms utilize stock splits to correct mispricing induced by investors’ 52-week high anchoring bias.