Derivatives Options What Happens To An Future (&/or Other Stock Derivatives I,e Options) When A Company's Stock Is Taken Over?

What happens to an Future (&/or other stock derivatives i,e Options) when a company's stock is taken over? - derivatives options

Suppose you sell a futures contract on the X stock in July 2015. The company is assumed to be values and therefore not cited. In this case, it is not true that no action which would be pronounced, so my contract would be worthless? Not even with the purchase, probably delivered by hand? Can someone explain the rules of society in Acquisitions? And mergers? Thank you, is the best answer.