Deutsche Börse on Monday launched a fresh effort to woo Euronext away from a deal with the NYSE Group, making key concessions on operations that would give its Paris-based rival more power than the Germans had been prepared to concede.

The move involves no additional cash and was not presented to the Euronext board. John Thain, NYSE Group chief executive, dismissed the move, saying: “Based upon what I have seen so far, I don’t see any reason to change any element of our transaction.”