The Swiss franc was trading close to five-week lows against the dollar early on Tuesday as the greenback held its recent gains on euphoria over last week's surprisingly strong US jobs report.
The dollar firmed to 1.3048/52 francs from 1.3067/72 late on Monday in Europe, while the euro was little changed at 1.5671/76 compared with 1.5675/79.
Dollar sentiment was also buoyed on Monday by a survey showing that the US services sector was benefiting from the economic upturn, fuelling expectations that US interest rates could start moving higher from their current low of one percent.
Dealers are also watching for signals that the Swiss National Bank could be ready to shift to a tightening bias after over a year of record low interest rates.
Swiss data shows a recovery is gathering pace as export sales pick up. Currency strategists at UBS said that while the dollar again moved higher against the franc in the previous session, the upside for the greenback was limited after most investors had unwound long euro positions.