Kyle Grillot / Bloomberg / Getty Images Ford was the best-performing stock in the S&P 500 Friday morning. Key Takeaways Ford shares surged Friday after the automaker posted quarterly earnings that topped analysts' estimates. However, Ford cut its outlook, citing the impacts of a fire at an aluminum supplier. Investors were so impressed by Ford Motor's third-quarter results that they overlooked a guidance cut. Ford (F) shares soared over 10% to pace the S&P 500 in recent trading after the "Big Three ...