Brent oil extended gains, after Saudi Arabia was said to be pushing its fellow OPEC members and some rivals to prolong supply cuts beyond June.
The dollar fell to session lows on Wednesday after President Donald Trump said he thinks the currency is getting "too strong."
Gold climbed to a 5-month high, extending its nearly 2 percent gains from the previous session, as investors shifted to safe-haven assets.
U.S. futures pointed to a slightly lower open as U.S. Secretary of State Rex Tillerson meets his Russian counterpart.
U.S. equities cut losses on Tuesday after President Donald Trump pointed to possible changes in Dodd-Frank Wall Street reform.
U.S. government debt prices rose as investors awaited talks between Secretary of State Rex Tillerson and Russian officials.
European markets close mixed on geopolitical tensions; Dialog Semiconductor down 14%
Asian equities closed mixed on Tuesday, on geopolitical tensions and as investors eyed Toshiba's twice-delayed earnings results.
The safe-haven yen rose, as investors considered a spectrum of risks including possible U.S. action in Syria and North Korea.
Crude oil eased from a five-week high as rising U.S. shale oil production offset concerns over geopolitical tensions in the Middle East.
Gold rose as investors sought assets seen as havens from risk as political tensions rose over North Korea, the Middle East and the French election.
Futures pointed to a marginally lower open as Secretary of State Rex Tillerson arrives in Moscow amid tensions over Syria.
U.S. equities closed fractionally higher on Monday amid geopolitical tensions while investors looked ahead to the start of earnings season.
U.S. bonds were mostly higher as comments from Rex Tillerson appeared to retreat from expectations of a campaign to remove Bashar Assad.
European markets were under pressure on Monday amid increased geopolitical risks as investors continued to digest the U.S. missile attack in Syria.
Asian equities finished mixed in Monday trade on the back of heightened geopolitical tensions in the Korean Peninsula.
Oil rose further above $55 a barrel on Monday, supported by another shutdown at Libya's largest oilfield and heightened tension over Syria.
The euro edged lower against the dollar on Monday, pressured by nervousness over the upcoming French presidential elections.
Gold slipped further as expectations that the Fed will press ahead with interest rate hikes counterweighed concerns over political tensions.
U.S. stock index futures pointed to a flat open on Monday as increased geopolitical risks continued to dominate headlines.