Stocks tumbled on Friday as the postelection rally fizzled and investors fretted over the path of interest rates. The Dow Jones Industrial Average lost 305.87 points, or 0.70%, to end at 43,444.99. The S&P 500 slipped 1.32% and closed at 5,870.62, while the Nasdaq Composite fell 2.24% to 18,680.12. Declines in pharmaceutical stocks weighed on the 30-stock Dow and the S&P […]