US STOCKS-S&P 500, Dow dip as DuPont warns; Nasdaq edges up By: Reuters: Company News June 27, 2014 at 15:26 PM EDT * Indexes: Dow off 0.2 pct, S&P down 0.1 pct, Nasdaq up 0.2 pct (Updates to afternoon trading, changes byline) Read More >> Related Stocks: Dollar General DuPont USA Keurig Green Mountain Nike Inc