WASHINGTON (Reuters) - President Donald Trump is leaning toward nominating Federal Reserve Governor Jerome Powell to be the next head of the U.S. central bank, two sources familiar with the matter said on Friday.

FILE PHOTO: Federal Reserve Governor Jerome Powell attends a conference at the Brookings Institution in Washington August 3, 2015. REUTERS/Carlos Barria/File Photo

The sources cautioned that while Powell had emerged as the leading candidate from a short list of five, Trump had not made a final decision and could always change his mind.

“I will be announcing it sometime next week,” Trump said in a video statement on Instagram. “It will be a person who hopefully will do a fantastic job. I have someone very specific in mind and I think everyone will be very impressed.”

Trump has said he has been considering Powell, as well as Stanford University economist John Taylor, for the post. He also has said he has not ruled out renominating current Fed Chair Janet Yellen, whose term expires in February.

He is expected to announce his pick, which would need to win Senate approval, before he departs on a trip to Asia on Nov. 3.

The term of current Fed chair Janet Yellen ends in February 2018, though her term as a Federal Reserve Board governor does not expire until 2024.

Trump had been working from a short list of five candidates that included his top economic adviser, Gary Cohn, and former Fed Governor Kevin Warsh.

A senior administration official said on Wednesday that Trump was unlikely to nominate Cohn given the importance of his role in helping to lead efforts to enact tax reform legislation currently being debated in Congress.

Trump has also privately voiced a desire to put his own stamp on the central bank, which has dimmed the prospect of him giving a new term to Yellen, another source said.

In an interview with Fox Business Network last Friday, Trump indicated he could nominate both Powell and Taylor for top jobs at the central bank. A vice chair post is currently open.