By Victor Reklaitis and Barbara Kollmeyer, MarketWatch

NEW YORK (MarketWatch) -- U.S. stocks notched modest gains in early trade Tuesday, with the S&P 500 again pushing above the milestone level of 2,000.

The benchmark hit an intraday record after a better-than-expected reading on consumer confidence, and investors took a mixed report on durable-goods orders in stride.

The S&P 500 (SPX) gained 3 points, or 0.2%, to 2,001 after touching an intraday record just shy of 2,003. The Dow Jones Industrial Average (DJI) advanced 46 points, or 0.3%, to 17,123, while the Nasdaq Composite (RIXF) tacked on 4 points, or 0.1%, to 4,561.

Today's economic data: Orders for U.S. durable goods skyrocketed a record 22.6% in July because of a surge in contracts for Boeing Co. (BA) aircraft, but bookings actually fell for most other industries, the Commerce Department reported.

Meanwhile, an August reading on consumer confidence came in at 92.4, above forecasts for 88.5, and U.S. home prices rose 1% in June.

Some analysts expect overseas headlines are more likely to slow down stocks, rather than U.S. economic data. It's "any change in the geopolitical landscape that has the potential to cause the most volatility," said Joao Monteiro, analyst at Valutrades, in a note. See: Peace-talk hopes diminished for Russia/Ukraine and U.S. military preps for surveillance flights over Syria.

More on S&P 500 and 2,000: The S&P 500 topped 2,000 for the first time on Monday but finished up 0.5% at 1,997.92. Plenty of people are asking where it goes from here. Read: The S&P 500 topped 2,000. Should you care?

Bill McNamara, technical analyst at Charles Stanley, said the S&P 500 continues to be supported by its long-term uptrend and 200-day moving average, with "little in the technical picture to suggest that this situation is about to change."

"In fact, although the index is starting to look somewhat overbought -- its 14-day MA (moving average) has pushed up to 65% -- its recent surge in upside momentum looks set to continue and further all-time highs (and a close above 2,000) cannot be too far away," he said in a note on Tuesday.

Movers and shakers: Best Buy Co. (BBY) shares fell nearly 6% amid a sluggish outlook. The struggling retailer is the day's worst performer in the S&P 500.

Burger King Worldwide Inc. (BKW) and Canada-based Tim Hortons Inc. (THI) confirmed Tuesday that they plan to combine to create a new company in an $11 billion deal. They are getting financing help from Warren Buffett's Berkshire Hathaway Inc. (BRK/A). Burger King shares rose 0.8%, while Tim Hortons' U.S.-listed shares gained 9%.

Shares of Kite Pharma Inc.(KITE) rose 17.5% after the biotech reported the majority of patients responded positively to its cancer-drug candidate.

Follow more of the day's notable stock moves here.

Other markets: The Stoxx Europe 600 rose, while the FTSE 100 came back from a U.K. holiday to play catch-up with gains it missed out on Monday. Asian stocks finished mixed. Gold(GCV4) found some renewed strength as the dollar (DXY) eased.

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