10 worst S&P 500 stocks led by Caterpillar decline By: MarketWatch September 24, 2015 at 11:11 AM EDT Caterpillar unveils 10,000 job cuts as weak commodities take their toll. Read More >> Related Stocks: CF Industries Holdings Caterpillar Deere & Co Delphi Automotive Plc FMC Corp Lam Research Parker-Hannifin Tenet Healthcare United Rentals Vulcan Materials