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US stocks slipped on Tuesday, dragged down by energy and materials shares as economic data disappointed.
Major indexes also posted losses for the month, but ended the quarter with gains.
The S&P energy index was down 1.2% on Tuesday following a more than 3% drop in US oil prices. The S&P materials index also fell 1.2%. Shares of Chevron, down 1% at $119.32, were the biggest drag on the S&P 500.
The Thomson Reuters Jefferies CRB commodity index ended down 1.6%, its largest daily decline since June 2013.
EBay, up 7.5% at $56.63, was the S&P 500's biggest percentage gainer for the day, helping to limit losses. The company announced a plan to spin off its PayPal unit.
US consumer confidence fell in September for the first time in five months and home prices in July rose less than expected from a year earlier, underscoring the unsteady nature of US growth.
Analysts are skeptical of how many more gains are in store for the market this year, with the S&P 500 up 6.7% since Dec. 31 and third-quarter earnings still ahead.
"The market continues to be very resilient, but it's a monster market. I think you could have a weaker fourth quarter than you've gotten used to, and I think we've made our highs for the year already," said Uri Landesman, president at Platinum Partners in New York.
Apple shares rose 0.6% to $100.75 after China approved iPhone 6 sales to begin Oct. 17.
The Dow Jones industrial average fell 28.32 points, or 0.17%, to 17,042.9, the S&P 500 lost 5.51 points, or 0.28%, to 1,972.29 and the Nasdaq Composite dropped 12.46 points, or 0.28%, to 4,493.39.
For the month, the Dow was down 0.3%, the S&P 500 was down 1.5% and the Nasdaq was down 1.9%. For the quarter, the Dow rose 1.3%, the S&P 500 gained 0.6%, and the Nasdaq climbed 1.9%.
Among the most active stocks on the NYSE were Ford Motor, down 2.12% to $14.79, a day after its disappointing profit forecast.
Besides eBay and Apple, the most actively traded stocks on Nasdaq included Move Inc, up 37.1% at $20.96.
Declining issues outnumbered advancers on the NYSE by 1,942 to 1,133, for a 1.71-to-1 ratio on the downside; on the Nasdaq, 1,864 issues fell and 824 advanced for a 2.26-to-1 ratio favoring decliners.
The benchmark S&P 500 index posted 15 new 52-week highs and 18 new lows; the Nasdaq Composite recorded 42 new highs and 138 new lows.
About 7.2 billion shares changed hands on US exchanges, above the 6.1 billion average for the last five sessions, according to data from BATS Global Markets.
