Exchange operator NYSE Euronext says its net income fell 75 percent in the fourth quarter of last year compared to a year earlier on the back of costs related to its upcoming takeover and debt refinancing.

In the last quarter of 2012, the owner of the New York Stock Exchange earned $28 million, compared with $110 million in the fourth quarter of 2011.

The company says Tuesday that excluding charges related to write-offs in preparation for its acquisition by Intercontinental Exchange and the refinancing, its earnings would have been $105 million against $130 million the year before.

Its 2012 earnings were down 29 percent at $462 million on falling trading volumes, largely related to the exceptional volatility that existed in markets in 2011.