US STOCKS-Wall St falls as lower oil prices weigh on energy stocks
* Oil prices drop about 1 percent
* ADP report: 177,000 jobs added in August vs est. 175,000
* Palo Alto drops after disappointing forecast
* Indexes down: Dow 0.19 pct, S&P 0.19 pct, Nasdaq 0.19 pct (Updates to open)
By Mamidipudi Soumithri and Yashaswini Swamynathan
Aug 31 (Reuters) - Wall Street was slightly lower on Wednesday, the last trading day of August, as a stronger dollar weighed on oil prices and materials companies.
Oil prices dropped about 1 percent as the dollar traded at three-week highs. Exxon fell 0.6 percent and was the top drag on the S&P.
The 0.74 percent drop in the S&P 500 energy index weighed on the benchmark.
Materials, which includes companies with large overseas operations, was off 0.62 percent. Continuación...