US STOCKS-Wall St falls as Grexit fears grow, volatility spikes By: Reuters: Company News June 29, 2015 at 13:57 PM EDT * Indexes down: Dow 1.34 pct, S&P 1.41 pct, Nasdaq 1.59 pct (Adds details, updates prices) Read More >> Related Stocks: Aratana Theraptcs Assured Guaranty Ltd First Merchants Corp Goldman Sachs Group MBIA Inc Seres Therapeutics Inc