The dollar index fell from a one-month high on Tuesday, finishing down 0.14 percent. The dollar gave up an early advance after an unexpected decline in July consumer confidence, while a 4 percent plunge in WTI crude oil to a one-week low lowered inflation expectations that could prompt the Fed to pursue easier monetary policy. Lower T-note yields also weakened the dollar’s interest rate differentials. Losses were limited by mild short covering ahead of the two-day FOMC meeting that began Tuesday and by safe-haven demand amid heightened Middle East tensions.