Revenues at OMX, the Nordic and Baltic exchange operator, increased 30% to Skr1.1bn (€123m) in the second quarter driven by equity trading. However, growth in its derivatives business, one of the main attractions for US merger partner Nasdaq, was only half that of its larger European rivals.

Derivatives trading on OMX, which agreed to merge with Nasdaq in May, rose 7% in the three months to the end of June compared to the same period last year. The increase is just half that of its main European rivals - NYSE Euronext's derivatives platform Euronext.liffe increased trading by 16% and Eurex, operated by Deutsche Börse and the Swiss stock exchange, rose by 14%.