risk arbitrage
noun[U]
FINANCE,STOCK MARKETukusthepracticeofbuyingandsellingsharesin twocompaniesthat areinvolvedin atakeoverinorderto make aprofitfrom thedifferenceintheirshareprices:
Thestrongreboundin USmergeractivitybroughtarenaissancein takeover-stockinvesting,knownasriskarbitrage.