[As for economies on the other side of the Atlantic,] there have been signs euro zone growth has peaked and inflation pressures coming through, ... That pinpoints the fact that there is far less dynamism across the euro-zone economies than in the U.S.

All the factors point to an upturn from here.

The U.S. economy is showing no signs of losing steam.

The U.S. economy is still doing fine, and the economic numbers are showing that. That means there's likely to be another two more rate increases, rather than just one, and that's going to support the dollar.

It's another case of euro-optimism being dashed by events.

The U.S. economy is showing no signs of losing steam. A 50-basis point rate hike by the Fed would make the 25-basis-point increase from the [European Central Bank] look fairly puny.

It's an incremental step to develop its foreign-exchange market and make its currency more transparent. The central bank has been heavily involved in the market and will probably still intervene.

This is unlikely to be a significant negative for the dollar. They're unlikely to start moving heavily out of dollars as U.S. assets still yield more than in Europe or other countries.

The dollar started a bit stronger today, then weakened a bit after the broadcasting of the bin Laden audio tape.