The US dollar index dipped on Wednesday as traders weighed renewed oil-driven inflation risks and waited for next week’s Federal Reserve meeting, while the Australian dollar gained on hawkish central bank comments. “There’s not really an overarching theme for markets… and I think it’s going to stay that way at least until next week into the FOMC,” said Shaun Osborne, chief FX strategist at Scotiabank. “We need to get a sense of what the Fed’s thinking.” The ongoing US war with Iran has…