The ASX 200 fell away throughout the session as Federal Reserve policymakers under new chair Kevin Warsh signalled the chance of a rate hike later this year, hitting tech, financials and rate-sensitive growth names. Defensives held up best, with Consumer Staples and Healthcare the only sectors to post a meaningful gain, while Energy, Materials and IT led the market lower. Oil extended its slide as the US-Iran deal on reopening the Strait of Hormuz raised hopes for a quick return of Gulf supply, while gold and iron ore stayed under pressure from firmer US rate expectations underpinning a rise in the $US.