A technical glitch halted trading on Eurex, Europe’s largest derivatives market, for about 60 minutes, adding to this month’s tally of exchange breakdowns following a three-hour shutdown of the Nasdaq Stock Market.

The New York Stock Exchange is to buy Euronext for about $10bn (€7.8bn) in cash and stock, creating the first transatlantic securities market in a deal that would pressure rival exchanges to consolidate.