0641 GMT - The dollar falls as investors turn cautious ahead of the release of the Federal Reserve's July meeting minutes later in the day. Markets have recently trimmed expectations for Fed interest-rate rises following weak U.S. labour market data and subdued inflation prints. While Fed Chair Kevin Warsh has refrained from providing forward guidance, the minutes could provide clues on whether tightening is possible. The minutes will be released at 1800 GMT. The DXY dollar index falls 0.2% to 99.472.