The Dow Jones Industrial Average and S&P 500 reached new highs to begin the week as tech stocks resumed their recovery. Apple Inc. (AAPL) - Get Report led the Dow, while Amazon.com Inc. (AMZN) - Get Report reached new all-time intraday records. Boeing Co. (BA) - Get Report contributed to the Dow's gains after announcing plans for a new, longer version of its 737 Max jet. The new jet is expected to be ready by 2020. Valeant Pharmaceuticals International Inc. (VRX) rose after hedge fund manager John Paulson was elected to the company's board. Paulson's Paulson & Co. holds a 5.6% stake in Valeant as of the end of March, making it the drugmaker's largest shareholder. Grocery and supermarket stocks were mostly higher in a rebound from Friday's selloff. Kroger Co. (KR) - Get Report , Sprouts Farmers Market Inc. (SFM) - Get Report and Walmart Stores Inc. (WMT) - Get Report had been lower last week after Amazon announced it will acquire Whole Foods Market Inc. (WFM) .