American Airlines Group Inc is down 3.5% and Genuine Parts Company inched down by some 0.4% in the first hours of trading at a time when the broader market is in green, after earlier today Goldman Sachs had lowered its rating on American Airlines to 'Neutral' from 'Buy' and decreased its rating on Genuine Parts to 'Sell' from 'Neutral'. Let's take a closer look at the two stocks, and see if the smart money agrees with Goldman on their outlook.