This excerpt taken from the NDAQ 8-K filed Feb 20, 2008.
Derivative instruments and hedging activities
OMX hedges certain of its internal cash flows based on gross inflows in subsidiaries. Under U.S. GAAP, this hedge does not qualify since the internal transaction is denominated in the same currency as the external expense in the subsidiary. As such, these hedge arrangements that are recognized in equity under IFRS are recognized in the income statement under U.S. GAAP.