Sweden's Financial Supervisory Authority (FI) said on Thursday U.S. exchange Nasdaq was qualified to be an owner of Nordic exchange firm OMX.
The regulator said it did not expect the development of OMX to be harmed under Nasdaq's
influence.
"FI believes Nasdaq fulfils the legal requirements as a buyer of a qualified stake in OMX," the regulator said in a statement.
On Wednesday, Nasdaq and Borse Dubai raised their bid to $4.9 billion and said they had controlled of 47.6% of shares in the Nordic exchange operator.