The Swiss franc fell sharply against the dollar in early trading on Thursday, tracking the euro lower ahead of the European Central Bank's monthly report seen flagging downside risks to euro zone economies. The franc fell 0.5 percent against the dollar compared to the New York close to trade at 0.9213 francs per dollar by 0752 GMT. The franc was steady against the euro at 1.2331 francs per euro.
Traders trimmed positions in the single currency ahead of euro zone economic growth numbers due later in the morning, which are expected to show that any recovery in the economic bloc remains fragile.