US STOCKS-Wall St mixed; weak results drag on energy stocks
* Second-quarter wage growth smallest in 33 years
* Wage data supports argument for Dec rate hike
* Exxon, Chevron fall as weak oil price hurts profits
* Indexes: Dow down 0.16 pct, S&P flat, Nasdaq up 0.18 pct (Updates to afternoon)
By Noel Randewich
July 31 (Reuters) - Wall Street was mixed on Friday as a drop in energy companies' stocks was offset by expectations the U.S. Federal Reserve may delay an interest-rate hike this year following weak wage data.
Exxon Mobil shares fell 3.5 percent while Chevron was down 3.9 percent after reporting poor quarterly earnings due to weak oil prices.
U.S. labor costs in the second quarter recorded their smallest increase in 33 years, with the Employment Cost Index edging up a less-than-expected 0.2 percent.
"The magnitude of the miss was definitely a bit of a surprise, especially as people were really gearing up for a September hike. This definitely puts a lower probability on that," said Stanley Sun, interest rate strategist at Nomura Securities International in New York. Continuación...