The Swiss franc edged up against the dollar on Thursday, tracking the euro which firmed on hopes US policymakers could strike a deal to avoid sharp fiscal tightening, though gains were capped by ongoing concerns over a Greek aid deal. The franc rose 0.1 percent against the dollar compared to the New York close, trading at 0.9283 francs per dollar. The franc was stable against the euro at 1.2036 francs per euro.