Both bourses denied an offer was made.
The report in Swedish newspaper ”Dagens Industri” said the Nasdaq, the second-largest U.S. stock market, made the 192 kronor (US$27.80) per share offer two weeks ago.
However, OMX denied it received an offer. Nasdaq also said it has not made an offer to buy the Swedish exchange.
Before the Swedish market opened, OMX issued a brief statement saying it had received neither a formal nor informal offer, but was in ”exploratory discussions with several exchanges and other market venues regarding possible forms of cooperation.”