Nasdaq got a piece of Europe with a $3.6 billion deal to acquire OMX, the Stockholm, Sweden-based home of the Nordic and Baltic exchanges, giving it a significant leg up in cash equities and options trading in Europe.The deal comes three months after London Stock Exchange jilted Nasdaq (nasdaq: NDAQ - news ) in its attempt to acquire a controlling stake of the LSE. Nasdaq continues to own 29% of the London market and may still be positioning itself for a run at the exchange, but because of U.K. rules, it won't be allowed to make another takeover attempt until February.