Borse Dubai, the holding company for Dubai Financial Market and Dubai International Financial Exchange, breached Swedish takeover rules ahead of its bid for control of OMX, Sweden's financial regulator, Finansinspektionen, has said.

Finansinspektionen, concluded that Borse Dubai broke takeover laws following the Dubai's exchange purchase of a 27.4% stake in OMX on 9 August, and its subsequent press release.

At the time Borse Dubai issued a statement claiming that its purchase of shares did not...