This paper examines post-revision return drift, or PRD, following analysts' revisions of their stock recommendations. PRD refers to the finding that the analysts' recommendation changes predict future long-term returns in the same direction as the change (i.e., upgrades are followed by positive...

If short sellers can destroy firm value by manipulating prices down, an informed blockholder has a powerful natural incentive to protect the value of his stake by trading against them. However, he also has a potentially conflicting incentive to use his information to generate trading profits. We...