It was the fourth-straight meeting in which the central bank left interest rates unchanged and the first with new Fed Chair Kevin Warsh.

The dollar was modestly weaker against the euro on Tuesday as investors awaited the conclusion of the Federal Reserve's policy meeting the following day, the first chaired by Kevin Warsh, with markets watching for any signals that the ​central bank could raise interest rates later this year.

Former Federal Reserve Chair Ben Bernanke famously said monetary policy is 98% talk and only 2% action. Kevin Warsh wants to shake up the mix.

The dollar held steady against most major peers ​on Wednesday ahead of the Federal Reserve's first policy decision under chair Kevin Warsh, which could see some volatility as investors adjust ‌to a new style of policy making and communication.

The dollar eased on Wednesday ahead of the Federal Reserve's policy meeting with optimism lingering over an interim U.S.-Iran agreement to end the war.

The US Federal Reserve is expected to hold interest rates steady on Wednesday at Kevin Warsh's first meeting in charge of the central bank, with rate hikes potentially on the horizon to combat surging inflation.