Over recent years, a substantial fraction of US convertible bond issues have been combined with a stock repurchase. This paper explores the motivations for these combined transactions. We argue that convertible debt issuers repurchase their stock to facilitate arbitrage-related short selling. In line with this prediction, we show that convertibles combined with a stock repurchase are associated with lower offering discounts, lower stock price pressure, higher expected hedging demand, and lower issue-date short selling than uncombined issues. We also find that convertible arbitrage strategies explain both the size and the speed of execution of the stock repurchases.

Announcements of stock-financed mergers and acquisitions (M&As) may attract short selling of bidder shares by merger arbitrageurs. We hypothesize that bidders with higher short-selling potential include a higher proportion of cash in their M&A payments to mitigate stock price declines resulting from arbitrage short sales. Consistent with this hypothesis, we find that the ex ante net lending supply of bidder shares has a positive impact on the percentage of cash in public target payments. Further tests, including a placebo analysis of public-to-private deals and an analysis of expected price pressure proxies, corroborate the impact of anticipated arbitrage-related price pressure on payment choice.