(Reuters) – Shares of the world’s largest inter-dealer broker TP ICAP jumped as much as 11% on Wednesday after U.S. hedge fund Phase 2 Partners asked the British company to explore a sale. Phase 2 Partners, which holds 7.7 million shares in the TP ICAP, urged the London-listed company to look for a new ownership structure through a potential sale or merger with another global trading platform. “I currently see your shares as significantly undervalued, believe management’s lack of stock ownership represents a significant governance failure… and believe the company needs to make decisive steps…