US STOCKS-Wall St dragged down by healthcare stocks
* Oil prices retreat from one-year highs
* St. Jude falls after warning on battery flaw in heart device
* Indexes down: Dow 0.38 pct, S&P 0.4 pct, Nasdaq 0.29 pct (Updates to open)
By Yashaswini Swamynathan
Oct 11 (Reuters) - U.S. stocks fell on Tuesday, dragged down by healthcare companies and Alcoa, which kicked off the earnings season on a disappointing note.
The S&P 500 healthcare sector dropped 0.71 percent as Illumina's disappointing results weighed. The company's stock lost more than a quarter of its value after the diagnostic test maker cut its third-quarter revenue forecast for the second time in a row.
Alcoa, which unofficially signals the start of the earnings period, reported revenue and profit that fell short of market expectations.
The aluminum producer's stock fell 7.7 percent on Tuesday morning.
"Earnings will begin to resolve the recent choppiness and uncertainty in the market, pushing investors one way or another," said Andre Bakhos, managing director at Janlyn Capital in Bernardsville, New Jersey. Continuación...