Mayer Brown Rowe & Maw, Skadden Arps Slate Meagher & Flom, Latham & Watkins and Cravath Swaine & Moore have all bagged roles in the $8bn (£4.3bn) tie-up between two of the largest futures and derivatives exchanges in the US.

The agreement sees Chicago Mercantile Exchange (CME) acquire rival exchange the Chicago Board of Trade (CBOT) in the latest multibillion-dollar deal in the booming US M&A market.