The dollar fell to a 15-month low against the yen on Thursday, on track for its worst week against the yen since 2008.
Oil futures rebounded Thursday afternoon after The Wall Street Journal reported OPEC members might be ready to cooperate on a cut.
Gold surged more than 4 percent to its highest in a year as U.S. Treasury yields persuaded investors to seek refuge in the metal.
U.S. sovereign bond prices fell on Wednesday, boosting yields as investors looked to the testimony from Federal Reserve Chair Janet Yellen.
European equities ended Wednesday's trade sharply higher, as sentiment was boosted by a rally in banks and remarks from Fed Chair Janet Yellen.
U.S. stock index futures indicated a sharply lower open on Thursday.
Monkeys threw a wrench into Asian markets in the Lunar New Year's first week of trading, with sell-offs in Japan, Singapore and Down Under Wednesday.
Oil prices seesawed on Wednesday as worries about a global supply glut offset a surprise drop in U.S. crude stockpiles.
Gold stabilized below a 7-1/2 month high on Wednesday after Janet Yellen comments.
CNBC takes a look at the leading suspects behind this year's roller-coaster ride for markets.
U.S. equities closed near the flatline after a choppy trading session, as investors looked ahead to Janet Yellen's testimony.
U.S. sovereign bond prices fell in fickle trade ahead of Tuesday's close.
European stocks slid to close sharply lower as investors remained pessimistic on global economic growth prospects.
Gold rose for an eighth session out of nine, climbing towards a 7-1/2-month high as investors sought the safe-haven asset.
Oil prices were pressured Tuesday by a report showing supply will not drop quickly enough to erode a global surplus.
The dollar tumbled to a four-month low on Tuesday as growing fears of a global slowdown pushed investors to safe-haven currencies.
Australian and Japanese markets tumbled on Tuesday, as investors pulled cash from stocks in favor of safe havens.
U.S. futures fell amid a slew of earnings releases, while oil and global growth concerns weighed on investors.
U.S. stocks closed off their session lows on Monday amid a late rally in the energy sector.
U.S. sovereign bonds prices surged on Monday, as volatility in stocks persisted and rate rise fears dominated markets.