US STOCKS-Wall St falls as Caterpillar, health stocks weigh
* Caterpillar hits 5-year low after sales forecast cut
* Health stocks on track for 5th day of losses
* Investors await Yellen speech at 5 p.m. ET
* Indexes down: Dow 1.1 pct, S&P 1 pct, Nasdaq 1.1 pct (Updates to early afternoon)
By Tanya Agrawal
Sept 24 (Reuters) - U.S. stocks were lower by about 1 percent in afternoon trading on Thursday after Caterpillar's sales forecast cut dragged on industrials and exacerbated fears of slowing global economic growth, and as health stock slipped again.
Investors were also cautious ahead of a speech by Federal Reserve Chair Janet Yellen, which could provide clues regarding the timing of an increase in interest rates.
Caterpillar, the world's biggest mining and construction equipment maker, said it could cut up to 10,000 jobs and shut plants as it faces challenging conditions in key regions and the mining and energy sector.
The company's shares fell as much as 7.9 percent to a 5-year low and were the biggest drag on the Dow. The S&P industrials index fell 1.3 percent. Continuación...