1215 GMT - The dollar's rise has been relatively muted in response to Federal Reserve Chairman Kevin Warsh's speech on Friday, where he warned of a potential need to raise interest rates if inflation didn't return back down to target, says MUFG's Derek Halpenny. This makes sense given investor's caution ahead of U.S. jobs data on Friday and inflation figures next week, where weak numbers could make a rate hike on Sept. 16 look less likely, he says. The Fed's September decision "remains a close call" ahead of these key data. "With an elevated degree of uncertainty given the busy month of central bank meetings, the dollar buying has been curtailed," Halpenny says. The DXY dollar index rises 0.2% to 99.633.