Wall Street opened Tuesday's trading with green arrows including record levels reached for the S&P 500 (SPX) and the Dow Jones ($DJI). Diane King Hall examines a few individual stocks on the move, including Wayfair (W), Spotify (SPOT) and Merck (MRK). For Merck, the biotech company pulled back from premarket gains as investors react to its latest earnings. Diane points to Spotify's subscriber guidance as a possible weak spot weighing on shares.