Eurex US on Friday begins its next assault on the strongholds of the Chicago derivatives exchanges by offering foreign exchange futures, attacking one of the Chicago Mercantile Exchange’s fastest-growing markets.

Earlier this year, Eurex US admitted defeat in its attempt to win Treasury futures trading from the Chicago Board of Trade and last month, rival Euronext.Liffe conceded the same in its battle for share of the CME’s flagship eurodollar interest rate futures.