NEW YORK—The Dow and S&P 500 edged higher on Friday and ended a turbulent week with slight increases, helped by gains in Tesla and Facebook that offset a tumble by Nike. Athletic wear company Nike’s shares fell 6.3 percent and were the biggest drag on the Dow and the S&P 500 after it delivered a downbeat sales forecast and warned of delays during the holiday shopping season, blaming a supply chain crunch. Shares of footwear retailer Foot Locker also fell sharply. On the flip side, Facebook climbed 2 percent and Tesla rose 2.7 percent. The S&P communication services sector climbed 0.7 percent and was the second-biggest sector gainer of the day after energy, up 0.8 percent. Stocks bounced back from a sharp selloff at the start of the week tied in part to concerns over a default by China’s Evergrande and its potential risk to global financial markets. On Friday, …