The top executive at NYSE Euronext (NYX) said Wednesday that other exchanges face potential goodwill charges following a sharp reversal in sector valuations.

Duncan Niederauer, chief executive of the transatlantic exchange operator, said deals done over the past two to three years could be prone to write-offs.

NYSE Euronext this week announced a $1.59 billion non-cash charge for goodwill and other assets stemming from its creation in 2007 from the merger of NYSE Group and Euronext-Liffe.

CME Group Inc. (CME) and IntercontinentalExchange Inc. (ICE) have also announced write-offs on some exchange investments.

Sector valuations have fallen around 70% from 52-week highs amid a broad slide in financial stocks and slowing volume growth, notably in derivatives.

Niederauer, in opening remarks at the company's investor day, said "other exchanges will have to address" the goodwill issue, suggesting more write-offs were likely to follow in a sector that has seen substantial consolidation over the past three years.

-By Doug Cameron, Dow Jones Newswires; 312-750-4135; doug.cameron@dowjones.com