 Tech stocks are among the gainers. Both the Nasdaq and S&P 500 are slated for weekly gains. Dow member Nike stock is tumbling 20% after the sneaker and sportswear company reported a drop in quarterly revenue and warned that sales could fall significantly over the next year. Shares of Walgreens Boots Alliance are up slightly after tumbling over 20% yesterday. It was the stock's largest percentage decline on record after the drugstore chain unveiled plans that could lead to the closure of thousands of underperforming stores and reduced its fiscal year earnings guidance.