The US dollar has risen as Donald Trump is on the verge of returning to the White House.
Bitcoin has also hit a new record high as traders wait for possible tax cuts under the Trump administration.
The outcome of the election is expected to have a major impact on the global economy.
This Wednesday, the dollar is up about 1.5% against a range of currencies, including the pound, the euro and the Japanese yen.
Trump has vowed to make the US "the bitcoin and cryptocurrency capital of the world."
The value of Bitcoin has also increased by $6,000 (£4,645) to a record high of $75,371.69, surpassing the previous level of $73,797.98 seen in March this year.
The comments by the head of the central bank, Jerome Powell, will be closely watched around the world.
On Friday, top Chinese officials are expected to reveal more details about Beijing's plans to tackle the slowdown in the world's second-largest economy.
