U.S. stock index futures pointed to a flat open on Friday, as Wall Street attempted to halt this week's losses.
European equities finished lower on Wednesday despite better-than-expected data from Germany, as technology stocks slid.
Gold fell and was heading for a third straight quarterly fall, pressured by a strong dollar and expectations of a Fed rate hike.
The euro fell against the dollar on Tuesday, leaving the single currency on track for its worst quarter ever.
The euro slumped against the dollar on worries over whether Greece would secure aid before it runs out of cash in three weeks.
Oil extended losses on Tuesday ahead of a nuclear pact that could release more Iranian crude into the oversupplied market.
Oil prices fell as officials from Iran and six world powers discussed a possible deal over Tehran's nuclear program.
The U.S. dollar edged lower against a basket of major currencies on Friday after comments from Federal Reserve Chair Janet Yellen.
The dollar was on track for its biggest one-day gain against the euro in a week on Thursday after traders reestablished bullish bets on the greenback.
Asian equities were mostly lower on Thursday following a sharp selloff on Wall Street overnight and an escalation of political turmoil in Yemen.
The dollar fell against a basket of major currencies after weaker-than-expected U.S. data combined with a robust survey of German business morale.
Gold dropped for a second straight session, as the dollar climbed on increasing prospects that the Federal Reserve may raise interest rates this year.
Gold extended gains to a seventh session as soft U.S. data boosted expectations the Federal Reserve would keep interest rates low..
Gold eased as traders booked profits after a seven-day rally and as the dollar rebounded on strong U.S. data.
Gold traded higher on Wednesday, hitting 2-1/2 week highs as the euro edged higher against the dollar.
WTI settled 3.6 percent up at $49.21 a barrel on Wednesday on a weaker dollar, fighting in Yemen and speculative buying.
WTI settled at its highest levels since March 4 after Saudi Arabia and its Gulf Arab allies began airstrikes in Yemen.
U.S. crude settled down 5 percent on Friday as fears about the disruption of crude shipments from Yemen's conflict eased.
Asian equity markets struggled for direction on Wednesday following an uninspiring lead from Wall Street overnight.
U.S. stock index futures indicated a sharply lower open on Thursday, with Dow futures tumbling 130 points after stocks plunged to close over 1 percent lower Wednesday.
Get the best of CNBC in your inbox
From a "Grexit" to the closure of banks, here are six myths about the Greek crisis, says Nicholas Economides, an NYU professor and adviser to Greece.
A worldwide slump in industry lies behind this year’s tumble in precious and base metal prices, a commodities expert has told CNBC.
China's rocky stock market ride can benefit private equity players, billionaire David Rubenstein says.