US STOCKS-Wall St opens sharply lower as Caterpillar weighs
* Caterpillar sinks after cutting sales forecast
* Jobless claims, August durable orders in line with estimates
* Investors await Yellen speech at 5 p.m. ET
* Indexes down: Dow 1.3 pct, S&P 1.14 pct, Nasdaq 1.17 pct (Updates to open)
By Tanya Agrawal
Sept 24 (Reuters) - U.S. stocks fell more than 1 percent in early trading on Thursday as Caterpillar's forecast cut weighed on industrials.
Investors were also apprehensive ahead of a speech by Federal Reserve Chair Janet Yellen.
Caterpillar fell 7 percent to its lowest level since 2010 after the company cut its 2015 revenue forecast and said it could cut up to 10,000 jobs.
The stock was the biggest drag on the Dow and on the S&P 500 materials index, which was down 1.69 percent. Continuación...