By Anora Mahmudova and Barbara Kollmeyer, MarketWatch

NEW YORK (MarketWatch) -- U.S. stocks edged higher on Wednesday, pushing the S&P 500 to an intraday record, as investors processed earnings reports from Boeing Co, Delta Air Line, Inc and PepsiCo Inc.

The S&P 500 (SPX) was 5 points, or 0.2%, higher at 1,988.52. The Dow Jones Industrial Average (DJI) dipped 17 points, or 0.1%, to 17,096.04. The Nasdaq Composite (RIXF) added 22 points, or 0.5%, to 4,478.89, with biotechnology companies leading the gains.

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Investors seem to brush off news that two Ukrainian fighter jets were shot down Wednesday near where Malaysia Airlines Flight MH17 was downed and continued ground attacks on Gaza.

Kim Caughey Forrest, investment strategist at Fort Pitt Capital said that geopolitical issues in the Middle East and Ukraine, may not affect businesses in the short-term, but in the long-term, "we will be affected if American companies cannot move freely in the world."

"At this point, overall earnings growth has already been priced in. Wall Street's full-year earnings estimates are too optimistic and eventually will come down," Forrest added.

The data calendar is empty for Wednesday, leaving investors to fix their attention on corporate earnings.

Biogen Idec Inc. (BIIB) jumped 11% after the biotechnology company's latest earnings results impressed investors all around, beating estimates on sales, profits, and guidance for the full fiscal year.

Boeing (BA) fell 2.4% even as the plane manufacturer lifted its core earnings-per-share outlook for 2014.

PepsiCo (PEP) rallied 4% after the company's second-quarter profit beat estimates and it lifted earnings guidance.

Delta Air Lines Inc. shares (DAL) climbed 3% after the company's second-quarter profit jumped 17%, driven by higher passenger and operating revenue.

Whirlpool Corp.(WHR) posted weaker-than-expected earnings, and shares slid 4.4%.

Investors also reacted to big tech earnings that came late Tuesday. Apple (AAPL) shares rose 1.6% after earnings that topped expectations. Also read: 5 reasons why Apple shares could rise another 16% this year.

Microsoft shares were flat after an analyst's upgrade. The company late Tuesday reported a 7.1% fall in quarterly profit, disappointing Wall Street forecasters, as it took a financial hit from the purchase of Nokia Corp's (NOK) cellphone unit.

After the close, earnings from Facebook Inc. (FB) and AT&T Inc. (T) will be among the highlights. (Read more about the day's notable movers here: http://www.marketwatch.com/story/apple-intuitive-surgical-among-stocks-to-watch-2014-07-23.)

Among other markets, the Stoxx Europe 600 index edged up 0.3% Wednesday, while Asia also logged a mostly-higher finish.

Crude oil prices (CLU4) rose ahead of key supply data, while gold prices (GCU4) were flat. The dollar rose against the British pound (GBPUSD)(GBPUSD) after minutes from the Bank of England's July meeting showed all members voted to keep monetary policy loose.

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