(Bloomberg) -- The dollar strengthened and Treasuries extended their steepest monthly loss since June 2015 as signs of a steady labor market and hawkish rhetoric from Federal Reserve officials over the past two weeks steered financial markets.

The U.S. currency rose for a fourth day, adding to the advance after a private jobs report showed firms added workers in line with estimates. Ten-year Treasury yields rose as traders almost doubled bets of a September Fed rate increase to 36%. The S&P 500 Index halted a five-month rally. Oil trimmed its advance in the best month since April.

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