The dollar fell to its lowest since mid-November after the Fed disappointed investors, before trying for gains.
Oil prices retraced early gains as traders grew less concerned about mounting tensions between the United States and Iran.
Gold hit an 11-week high after the U.S. Federal Reserve gave no clear signal on the likelihood of a March interest rate rise.
U.S. stock index futures pointed to a lower open on Thursday as traders eyed a big day of earnings and digested economic data.
Asian stocks came under pressure on Thursday as investors flooded into safe haven plays on concerns related to the policies of U.S. President Donald Trump.
U.S. equities closed mostly higher on Wednesday after the Federal Reserve kept interest rates unchanged, as was widely expected.
Treasury yields edge off highs after Fed statement
European markets closed higher on Wednesday as investors focused on corporate earnings.
The U.S. dollar index has now erased most of the day's gains in the wake of the decision.
U.S. supply data suggested a crude glut may persist, despite signs Russia and OPEC producers are delivering on promised supply reductions.
Gold prices held their levels Wednesday after the Federal Reserve left interest rates unchanged at its latest meeting.
U.S. stock index futures pointed to a higher open on Wednesday as traders eyed the latest announcement from the Federal Reserve.
Asian shares were mostly higher on Wednesday after China's manufacturing sector showed signs of expansion in January.
U.S. equities traded mixed as investors continued to evaluate the latest policies from the White House.
U.S. government debt prices were higher on Tuesday as investors digested a batch of economic data.
U.S. stocks pointed to a lower open on Tuesday as traders continued to digest President Trump's controversial refugee policy.
European markets closed lower on Tuesday as investors focused on data and earnings while keeping an eye on Trump's immigration policy.
The U.S. dollar tumbled against key rivals on Tuesday and was on course for its worst month since March.
A Reuters survey pointed to a strong start by the exporter group in implementing its first supply cut deal in eight years.
Gold reached its highest level in a week as unnerved investors bought bullion.