Both stock price synchronicity and crash risk are negatively related to the firm's ownership by dedicated institutional investors, which have strong incentive to monitor due to their large stake holdings and long investment horizons. In contrast, the relations become positive for transient institutional investors as they tend to trade rather than monitor. These findings suggest that institutional monitoring limits managers' extraction of the firm's cash flows, which reduces the firm-specific risk absorbed by managers, thereby leading to a lower R². Moreover, institutional monitoring mitigates managerial bad-news hoarding, which results in a stock price crash when the accumulated bad news is finally released.