US STOCKS-Stocks slip but post best month in four years
* Exxon, Chevron rise after results
* LinkedIn, AbbVie soar after results
* Consumer spending barely rose in September
* Indexes fall: Dow 0.52 pct, S&P 0.48 pct, Nasdaq 0.4 pct (Updates to close)
By Lewis Krauskopf
Oct 30 (Reuters) - U.S. stock indexes finished with their strongest monthly performances in four years on Friday, even as they dipped for the day amid a mixed bag of earnings reports.
For October, all three major indexes posted their biggest percentage increases since October 2011, with the S&P 500 rising 8.3 percent, led by energy and materials, while a measure of volatility fell.
On Friday, CVS Health fell 4.8 percent to $98.78 after a disappointing profit forecast for 2016.
The S&P 500 energy index was the best performing sector, rising 0.7 percent. Exxon rose 0.6 percent and Chevron 1.1 percent after better-than-expected results. Continuación...