Why Do Some Firms Announce Stock Buybacks But Not Follow Through?

Companies buy back stocks for a variety of reasons. One rationale is a key motive for a new study: Managers of undervalued firms use stock repurchases as a mechanism to signal firm value. Curiously, Finance Professor Stacey Jacobsen of SMU Cox and co-author Utpal Bhattacharya find a large number of firms announce share repurchases but do not actually follow through with the buyback. The stock market tends to view repurchase announcements as good news, according to its reaction.