An effective and prudent way to increase shareholders' wealth is by buying back shares. Companies often use funds to buy back shares from the open market to lower the number of outstanding shares. This helps boost the bottom line, in turn enabling the distribution of more profits to shareholders.Here we focus on three insurers — Axis Capital Holdings Limited (AXS) , Radian Group (RDN) and RenaissanceRe Holdings Limited (RNR) — whose board of directors recently approved new share buyback programs, banking on ...