Nike's stock is having its worst day in 26 years, and would cut more than 100 points off the Dow's price

Shares of Nike Inc. NKE, +0.91% plunged 12.9% toward a one-month low in premarket trading Friday on the back of a disappointing earnings report, as they head for the biggest one-day selloff in 26 years. The athletic apparel and accessories giant’s stock was the biggest decliner among Dow Jones Industrial Average DJIA, +0.87% and the S&P 500 SPX, +1.03% trading ahead of the open. The stock’s implied price decline would shave about 104 points off the Dow’s price, while Dow futures shed 106 points, or 0.3%. T ...