US STOCKS-Wall St mostly gains on earnings; biotechs rally By: Reuters: Company News July 23, 2014 at 14:25 PM EDT * Dow down 0.1 pct, S&P up 0.2 pct, Nasdaq up 0.4 pct (Updates to afternoon trading) Read More >> Related Stocks: Apple Biogen Idec Boeing Co Intuitive Surgical Microsoft PepsiCo