US STOCKS-Wall St rallies 1 pct; S&P up for 4th straight day
* Apple rallies, lifting S&P 500 and Nasdaq
* Weakness in Coca-Cola limits Dow's advance
* S&P 500 back above 200-day moving average
* Indexes up: Dow 0.6 pct, S&P 1.3 pct, Nasdaq 1.6 pct
By Ryan Vlastelica
NEW YORK, Oct 21 (Reuters) - U.S. stocks rallied on Tuesday, with the S&P 500 on track for a fourth straight session of gains as Apple and Texas Instruments jumped following their results.
The results gave an outsized boost to the tech-heavy Nasdaq index, but the Dow's gains were limited by a selloff in Coca-Cola shares.
The S&P 500 has gained 3.5 percent over the past four sessions, rebounding after a four-week decline that took the benchmark index down nearly 10 percent from its intraday record.
In a sign that momentum is turning more positive, the S&P returned back above its 200-day and 14-day moving averages, while the CBOE Volatility index fell 10 percent to 16.71. The VIX was below one-month VIX futures for the first time since Oct. 8. Continuación...