By Carla Mozee and Anora Mahmudova, MarketWatch

NEW YORK (MarketWatch) -- The U.S. stock market started the second half of 2014 on a positive note, with investors looking at auto sales, manufacturing activity and construction spending on Tuesday morning.

The S&P 500 (SPX) opened 6 points, or 0.3%, higher at 1,967.07. The Dow Jones Industrial Average (DJI) began the session up 87 points, or 0.5%, at 16,911.10. The Nasdaq Composite (RIXF) added 21 points, or 0.5%, at 4.428.85 at the start of the day.

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Investors await two separate reports on the manufacturing sector, with the first scheduled for release at 9:45 a.m. Eastern. Data firm Markit will issue the final reading of its U.S. manufacturing purchasing managers index for June. Its preliminary figure, reported last week, was 57.5, up from 56.4 in May.

Ahead of the U.S. reports, two separate manufacturing PMIs from China showed improvement in June, but manufacturing activity in the euro zone slowed.

At 10 a.m. Eastern, the Institute for Supply Management's June manufacturing report is forecast to come in at 55.7%, edging from 55.4% in May. "Overall, the ISM continues to point to an expansion in the manufacturing sector, which has been one of the better-performing sectors in the U.S. economy," said Mizuho strategist Sireen Harajli in a Monday note.

A report on construction spending in May from the Commerce Department is expected at 10 a.m. Eastern. Outlays for projects are likely to rise 0.7%, according to economists polled by MarketWatch.

Investors will also pay attention to June car sales figures to assess the health of U.S. consumers. Analysts expect, on average, stronger sales than in the same month a year ago, which would place the industry on track for a more than 3% sales increase this year to 16.4 million cars.

Shares of General Motors Co. (GM.XX) were 1% higher, while shares of Ford Motor Co. (F) inched up 0.4%.

Shares of Netflix Inc.(NFLX) rose 3.6% after Goldman Sachs equity analysts upgraded the stock to a buy, from neutral.

Shares of Urban Outfitters Inc. (URBN) were down 2.7% after analysts at Wedbush downgraded the stock to neutral from outperform, citing risks of a slowdown in the retailer's Anthropologie unit.

Oracle Corp. (ORCL)on Tuesday said it priced $10 billion in notes and plans to use the proceeds from the offering for general corporate purposes. This may involve stock buybacks, paying cash dividends, repaying debt and funding future takeovers, including its pending acquisition of Micros Systems Inc. (MCRS) Oracle's bond pricing is among the largest corporate-bond deals of the year, according to a Wall Street Journal calculation.

Also in Silicon Valley news, Hewlett-Packard Co. (HPQ)reached a settlement in three shareholder lawsuits related to its purchase of software firm Autonomy in 2011. Shares edged up 0.3%.

In other markets, Japan's Nikkei Average rose 1.1% and Europe's Stoxx 600 was higher, with BNP Paribas SA gaining after the French bank agreed to pay a record $8.8 billion settlement to U.S. authorities for violating U.S. sanctions.

U.S. benchmark crude-oil futures (CLQ4)rose 31 cents to $105.68 a barrel and gold futures (GCQ4)climbed $4.90 to $1,326.90 an ounce.

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