By Sara Sjolin, MarketWatch

Trade deficit expected to widen as strong dollar hurts export

After a choppy start to the week, U.S. investors were more upbeat on Tuesday, as stock futures pointed higher ahead of fresh trade data and key meetings on Greece's future.

Futures for the Dow Jones Industrial Average gained 73 points, or 0.4%, to 17,700, while those for the S&P 500 index picked up 10.90 points, or 0.5%, to 2,075.25. Futures for the Nasdaq 100 index climbed 19.75 points, or 0.5%, to 4,442.59.

The indicated gains would erase losses from Monday (http://www.marketwatch.com/storyno-meta-for-guid), when jitters over Greece's landslide referendum result and tumbling oil prices added pressure on U.S. stock markets, which closed with losses of 0.3%-0.4%.

Greece remained in the headlines ahead of an emergency Eurogroup meeting of finance ministers and a summit of eurozone leaders in Brussels Tuesday. Politicians will discuss a last-ditch plan to keep the debt-laden country in the eurozone, and Greece's Alexis Tsipras-led government is expected to submit a fresh set of reform proposals ahead of the meetings. Read: Greek debt crisis: Who's meeting and when on Tuesday (http://www.marketwatch.com/story/greek-debt-crisis-whos-meeting-and-when-on-tuesday-2015-07-07)

Greece's stock market will remain shut Tuesday and Wednesday (), alongside the extended closure of the country's banks, the Hellenic Capital Market Commission said.

U.S. data: The U.S. trade deficit figure for May is due at 8:30 a.m. Eastern Time, and economists polled by MarketWatch expect a widening to $42.1 billion, from $40.9 billion in April (http://www.marketwatch.com/story/us-trade-deficit-sinks-19-in-april-2015-06-03).

"Trade data have been volatile in recent months as a result of the West Coast port strikes that were resolved in mid-February," said Barclays analysts in a note.

"Exports have softened over the past six months on weak international demand and the stronger dollar. Container volumes for May suggest a modest uptick in imports and a decline in exports, which we expect to lead the deficit to widen," they added.

At 10 a.m. Eastern, a report on job openings for May is due, followed by consumer-credit numbers for the same month at 3 p.m. Eastern.

There are no Fed speakers on the docket for Tuesday.

Oil rebound:Oil prices partly recovered (http://www.marketwatch.com/story/crude-oil-struggles-to-recover-from-selloff-2015-07-07) from Monday's carnage, with the August contract for crude oil jumping 1% to $53.04 a barrel. Brent crude for the same month gained 1.3% to $57.26 a barrel.

The contracts slid 7.7% and 6.3% (http://www.marketwatch.com/story/oil-tumbles-4-after-greek-voters-reject-creditors-reform-proposal-2015-07-06), respectively, on Monday. The selloff was driven by the turmoil in Greece and a potential Iranian nuclear deal, which may result in a flood of millions of barrels of oil, adding to global supplies.

Movers & shakers: Shares of Advanced Micro Devices Inc.(AMD) sank 13% premarket after the chip maker cut its outlook late Monday (http://www.marketwatch.com/story/amd-warns-revenue-to-fall-short-on-weak-pc-demand-2015-07-06).

A. Schulman Inc.(SHLM) could also be active, after the plastic manufacturer late Monday said it swung to a loss in the third quarter (http://www.marketwatch.com/story/a-schulman-swings-to-a-loss-cuts-forecast-2015-07-06-174854739).

Advance Auto Parts Inc.(AAP) was further in the spotlight after S&P Dow Jones Indices said on Monday it would add the company's stock to the S&P 500 index (http://www.marketwatch.com/story/advance-autoparts-set-to-join-the-sp-2015-07-06).

Before the market open on Tuesday, MSC Industrial Direct Co.(MSM) is forecast to post quarterly earnings of 96 cents a share on revenue of $744.9 million.

Other markets: Chinese stock indexes moved sharply lower (http://www.marketwatch.com/storyno-meta-for-guid), continuing the recent downbeat trend in the country's financial markets. Trading was halted in shares (http://www.marketwatch.com/story/over-20-of-listed-china-stocks-now-in-trading-halt-2015-07-07) in more than 200 mainland-traded China-traded companies during the selloff. The rest of Asian markets closed mixed. European stocks struggled for direction (http://www.marketwatch.com/storyno-meta-for-guid), with investors waiting for the latest word on Greece.

Gold declined, while the dollar moved higher against most major currencies.

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