The company posted solid quarterly results and adjusted several guidance items.American Axle & Manufacturing (AXL 4.83%), a company that quite literally helps underpin the auto industry, reported encouraging quarterly results Friday morning. Subsequent to that, investors bid up its stock during the day, to the point where it closed nearly 5% higher in price. That made it an outlier, as the S&P 500 index's rise was a far more modest 0.5%.A convincing double beatFor its second quarter, American Axle posted sa ...