US STOCKS-Wall St dragged down by Apple, health stocks
* Fed Chair Janet Yellen to speak at 4:00 p.m. ET
* Apple drops on Barclays price target cut
* Indexes down: Dow 0.16 pct, S&P 0.13 pct, Nasdaq 0.33 pct (Updates to early afternoon)
By Yashaswini Swamynathan
Sept 29 (Reuters) - Wall Street was lower in choppy trading late Thursday morning after two straight days of gains, pulled lower by Apple and healthcare stocks.
The S&P healthcare index dropped 1.04 percent as shares of Merck and Johnson & Johnson booked losses.
Apple fell 1.23 percent after Barclays cut its price target. The stock was the biggest drag on Wall Street.
"The markets are taking a step back after a couple of pretty good days," said Paul Nolte, portfolio manager at Kingsview Asset Management in Chicago.
"It is the end of the quarter so there are people messing around with some positions." Continuación...