ISE rallies 43% on Deutsche Boerse bid German firm would pay premium of nearly 50% in $2.8 billion deal By Greg Morcroft, MarketWatch Last Update: 10:26 AM ET Apr 30, 2007 NEW YORK (MarketWatch) -- Shares of International Securities Exchange, the operator of an electronic options- and stock-trading platform, jumped 43% in early trades Monday after the company confirmed it was in advanced talks to sell itself to Germany's Deutsche Boerse. Deutsche Boerse said it is negotiating to buy the company for $67.50 a share, or about $2.8 billion. The ISE said in a statement that the deal is subject to negotiation of final terms and must be approved by the company's board. 'I'm not sure if anything can be considered a surprise anymore when it comes to cross-border, cross-asset exchange partnerships or acquisitions.' â Brad Bailey, Aite Group The deal's current terms offer an almost 50% premium to holders of International Securities Exchange, a 7-year-old company known as ISE. It also ranks as the largest German bid for a U.S. financial company since Deutsche Bank paid $9.8 billion for Bankers Trust in November 1998.