Despite some bearish valuation pressures for the broader tech sector today, Snap (SNAP 4.20%) stock is moving higher in Tuesday's trading. The company's share price was up 4.2% as of 1:30 p.m. ET. At the same point in the daily session, the S&P 500 had dipped 0.1%, and the Nasdaq Composite was down 0.4%.Snap is getting a boost from new analyst coverage from Bernstein. The investment firm published a note on the company this morning that maintained a market perform rating on the stock and increased its one-y ...