The Fed Chairman could give the dollar bulls reason to pause, ending its rally on rumors of the central bank unwinding its aggressive monetary stimulus program.
Confidence returned to most Asian stock markets on Wednesday after investors were reassured that global central banks would not pare down their economic stimulus programs.
Stocks closed higher but off their best levels after two Fed officials dampened speculation the central bank was ready to consider "tapering" its bond-buying.
Gold, down in seven of its last eight sessions extended earlier losses on Tuesday on a firm dollar, weak technical signals and speculation that the U.S. Federal Reserve might rein in its stimulus program.
U.S. Treasurys prices were little changed on Tuesday as most investors moved to the sidelines.
The U.S. dollar fell against the euro on Tuesday after St. Louis Federal Reserve President James Bullard dented expectations the U.S. central bank may taper its bond purchases.
Oil fell on Tuesday, on concerns that the U.S. Federal Reserve might scale back its quantitative easing program, which could damage fragile demand.
Caution prevailed in Asian trade on Tuesday as investors grow concerned about the duration of global monetary stimulus ahead of Federal Reserve chief Ben Bernanke's testimony to the U.S Senate.
Gold and silver prices gained about 2 percent after a roller-coaster session that opened with a gut-wrenching dive in silver prices to their lowest in 2-1/2 years before an abrupt midday turnaround.
Crude oil prices rose on Monday, reversing early losses to trade higher by late morning in New York as the dollar weakened.
The U.S. dollar fell against the euro and yen on Monday as traders pared back expectations Federal Reserve Chairman Ben Bernanke would hint at tapering bond purchases this week.
Asia's stock markets were in rally mode on Monday after better-than-expected U.S data boosted investor confidence in the global economic recovery.
Prices for U.S. Treasurys fell after data showed consumers grew more optimistic in May and an index of leading indicators pointed to economic growth ahead.
Gold fell for a seventh straight session on Friday, as speculation that the Federal Reserve may soon rein in monetary easing lifted the dollar.
U.S. government debt prices fell on Monday, as traders waited for further clues on whether U.S. growth will be strong enough for the Federal Reserve to taper its bond purchases.
Brent crude oil climbed for a third straight session, supported by a raft of strong economic data from top oil consumer the United States.
The dollar rose against a swath of currencies on Friday, rocketing to 4 1/2-year high against Japan's yen.
China's benchmark index out-performed the broader Asian market for a second straight session on Friday as investors cheered moves by the government to ease strict regulation while the rest of Asia's equity markets traded cautiously as concerns grew over a U.S. Federal Reserve exit from quantitative easing.
Wall Street's stocks-are-cheap meme looks as if it will start coming under stress if what Citigroup calls a "profitless rally" continues.
Some market watchers say they are starting to spot something that they haven't seen for a while: sellers moving back into stocks.
European shares were flat on Friday as talks over the "fiscal cliff" stalled.
European shares closed lower on Wednesday for a third consecutive session, with resurging worries about the global economic outlook undermining investor sentiment.
Standard & Poor's decision to cut Spain's credit rating to one notch above junk status is weighing on markets.