US STOCKS-Wall St falls on Greek default fears, volatility spikes By: Reuters: Company News June 29, 2015 at 15:05 PM EDT * Indexes down: Dow 1.46 pct, S&P 1.55 pct, Nasdaq 1.82 pct (Updates prices, adds market commentary, changes byline) Read More >> Related Stocks: Aratana Theraptcs Assured Guaranty Ltd First Merchants Corp Goldman Sachs Group MBIA Inc Seres Therapeutics Inc