U.S. stocks fell about 1 percent, with the S&P 500 falling below its 200-day moving average, as investors awaited developments in the Greece.
European markets turned sharply lower in afternoon trade on Tuesday as concerns that Greece's negotiations with its creditors will drag on without a viable debt plan.
Gold fell to a near four-month low on Tuesday as the dollar climbed ahead of an emergency euro zone summit on Greece.
Oil futures gave up gains Tuesday as China's stock market took another tumble and Greece moved closer to leaving the euro zone.
The euro fell more than 1 percent against a buoyant U.S. dollar on Tuesday.
U.S. Treasury prices dipped on Tuesday, as focus turned to U.S. data and the first of this week’s Treasury auctions – a $24 billion 3-year note sale.
Mainland shares led losses in a mixed trading session in Asia on Tuesday.
U.S. stocks closed mildly lower, recovering from sharp opening losses on selloff overseas, as traders shook off concerns of contagion from Greece.
Europe closed lower on Monday, after Greeks voted "no" to creditors' reform proposals and Greek Finance Minister Yanis Varoufakis resigned.
Oil prices fell sharply after Greece rejected debt bailout terms and as negotiators neared a deadline on Iran's nuclear program.
Gold turned higher on Monday as France and Germany told Greece the door was open to negotiations after Greek voters had voted no.
The euro tumbled across the board, but was off its lows, after Greece voted to reject the conditions tied to the country's debt bailout deal.
U.S. Treasurys rallied on Monday, after a "no" vote in a Greek referendum on the country's bailout terms fanned fears of Greece exiting the euro zone.
China was the lone bright star in Asia on Monday, after a 'No' vote in Greece ignited a wave of risk aversion.
European equities closed lower on Friday as investors looked ahead to Sunday, when a referendum that could affect Greece's future in the euro zone will take place.
U.S. stock index futures indicated a higher open, recovering some of the previous day's decline as investors eyed developments in Greece.
Oil prices dropped as a rising U.S. rig count stoked fears of oversupply and after Chinese regulators opened an investigation into suspected stock market manipulation.
Gold was steady above a 3-1/2 month low, as sluggish US jobs data tempered expectations for a September rate hike by the Fed and hurt the dollar.
The dollar stuck around as disappointing US jobs data and caution ahead of Greece's referendum on bailout conditions kept the market mood subdued.
Stock markets in China extended their selloff on Friday following news that securities regulators are investigating suspected market manipulation.
Get the best of CNBC in your inbox
With Greece and Puerto Rico’s debt-wrangling in the spotlight, CNBC takes a look at what happens when countries fail to repay their debts.
Athens Chamber of Commerce President Constantine Michalos discusses the country's biggest fear after the referendum.
National pride can be a great thing but it's been terribly misguided in Greece, says Warwick professor Haridimos Tsoukas.