Deutsche Boerse to sell ISE options exchange to Nasdaq

By John McCrank and Arno Schuetze NEW YORK/FRANKFURT (Reuters) - Deutsche Boerse is selling U.S. options exchange operator International Securities Exchange for $1.1 billion to Nasdaq , potentially strengthening its hand in a proposed merger with London Stock Exchange (LSE) . Deutsche Boerse said late on Wednesday that it was set to book a disposal gain in the high triple-digit millions of euros from selling ISE, having written it down continuously since acquiring it for $2.8 billion in 2007. Th