U.S. stocks ended higher after a choppy session on Tuesday, as a rebound in U.S. oil prices helped offset concerns about a slowdown in China and the Greek debt crisis.
The S&P energy index .SPNY reversed course to trade up 0.9 percent as U.S. crude oil CLc1 rose 0.7 percent after trading as much as 3.7 percent lower earlier in the day.
U.S. commercial crude oil stocks likely slipped in the week ended July 3 after rising for the first time since April in the previous week, an expanded Reuters survey showed on Tuesday.
"The decline in oil ended," said Stephen Massocca, Chief Investment Officer at Wedbush Equity Management LLC in San Francisco. "Energy stocks bounced, and when that happened it helped the indices move higher."
Concerns about China's economy and its sliding stock market have weighed recently on an already ravaged global commodity sector, with prices of copper, coal, natural gas and iron ore falling towards their 2015 lows.
Euro zone leaders held an emergency meeting in Brussels on Tuesday and plan another on Sunday to approve a plan to aid Greece if creditor institutions are satisfied in the meantime with a Greek loan application and reform commitments.
German Chancellor Angela Merkel said she expected a formal loan request from Athens on Wednesday and more detail on how Greece would cooperate to make its economy more competitive on Thursday, in order to seek the approval of the German parliament to start negotiations.
The Dow Jones industrial average .DJI rose 93.33 points, or 0.53 percent, to end at 17,776.91. The S&P 500 .SPX gained 12.58 points, or 0.61 percent, to 2,081.34 after briefly falling below its 200-day moving average. The Nasdaq Composite .IXIC added 5.52 points, or 0.11 percent, to 4,997.46.
Nine of the 10 major S&P 500 sectors finished higher. The utilities index .SPLRCU jumped 2.48 percent while the materials index .SPLRCM was down 0.33 percent.
Some investors believe the storm clouds over Greece and China may give the Federal Reserve reason to hold off raising U.S. interest rates, or at least slow the pace of their rise.
"The U.S. economy should benefit from lower interest rates and lower oil prices that are a result of a slower China and the Greek crisis," said Paul Zemsky, chief investment officer, Multi-Asset Strategies and Solutions, at Voya Investment Management.
A warning from Chipmaker Advanced Micro Devices (AMD.O) about weak demand for personal computers pushed its shares 15.4 percent lower and hurt peers such as Nvidia (NVDA.O) and Intel (INTC.O).
Advancing issues outnumbered declining ones on the NYSE by 1,837 to 1,248, for a 1.47-to-1 ratio on the upside; on the Nasdaq, 1,636 issues fell and 1,150 advanced for a 1.42-to-1 ratio favoring decliners.
The benchmark S&P 500 index posted 14 new 52-week highs and 48 new lows; the Nasdaq Composite recorded 46 new highs and 166 new lows.
About 8.6 billion shares traded on all U.S. platforms, according to BATS exchange data, well above the average of 6.9 billion in the past five sessions.
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