Dollar wobbles as Treasury's bond-market buybacks raise fresh concerns

Aug 21 : The dollar slipped on Friday and was set to end a bumpy week lower, as investors questioned whether the U.S. Treasury's efforts to calm the bond markets might end up undermining confidence in the currency.Those concerns pushed the euro up 0.13 per cent to $1.1694, on course for its fourth consecutive weekly gain. The British pound was up 0.15 per cent to $1.3652, holding close to its highest since May.U.S. Treasury Secretary Scott Bessent said on Thursday he may increase the government's repurchases of Treasuries further, a day after the department surprised markets with a pledge to double the size of buybacks of longer-dated debt to rein in bond yields.But some argued that efforts to keep a lid on longer-term yields may only shift pressure elsewhere in U.S. markets, with the curr