Arbitrageurs are important players in the buy-back market, primarily because of certain tax considerations. One important driver is the repurchase price a company is permitted to offer in a share buy-back. Particular attention should be placed to secondary market transactions during a share buy-back (e.g., sales of ADRs). Novelties include VWAP-based buy-back programs and buy-backs executed via Dutch auction. 

By Hansjürg Appenzeller / Dieter Grünblatt (Reference: CapLaw-2019-17)