We analyze a model in which a firm’s manager privately learns about the expected return on the firm’s project and strategically discloses it to investors (i.e., discretionary disclosure). Based on the manager’s disclosure, investors decide whether to withdraw their investments from the firm. Our analysis indicates that investors’ optimistic prior beliefs in the firm reduce the possibility of their withdrawals and the manager’s incentive of discretionary disclosure, whereas pessimistic beliefs increase them. We further examine the effects of a commitment to reporting of bad news, namely, the conservative disclosure rule. This rule always suppresses the manager’s incentive of discretionary disclosure; however, it increases (reduces) investors’ withdrawals when they are optimistic (pessimistic) about the firm’s project.