US STOCKS-Nasdaq slumps to worst day since July; S&P 500 dips By: Reuters: Company News September 15, 2014 at 16:32 PM EDT * Indexes: Dow up 0.26 pct, S&P off 0.07 pct, Nasdaq off 1.07 pct Read More >> Related Stocks: Apple Bank of America Drdgold Ltd ADR Facebook Netflix Yahoo