V - Hot Stocks: ROKU PYPL downgrades; V gets dinged by AMZN; VREX earnings; NVMI makes acquisition

Credit card fees and analyst comments provided key catalysts for trading in Wednesday's midday action. This included selling pressure on Visa (NYSE:V) following news that Amazon will quit accepting its U.K.-issued credit cards. On the analyst front, Roku (NASDAQ:ROKU) and PayPal (NASDAQ:PYPL) both dropped after they received separate downgrades from Wall Street experts. Looking at some of the standout intraday winners, Varex Imaging (NASDAQ:VREX) posted a double-digit percentage gain, thanks to a strong earnings report. Meanwhile, Nova (NASDAQ:NVMI) pushed higher, as news of an accretive acquisition gave the stock a boost. Decliner Visa (V) retreated about 5% in midday action after Amazon announced that it will stop accepting V's credit cards issued in the U.K. The new policy, which goes into effect next year, is aimed at payment networks with high transaction fees. Rival credit card giant Mastercard (NYSE:MA) also lost ground on the day, slipping by 4% in intraday

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Hot Stocks: ROKU, PYPL downgrades; V gets dinged by AMZN; VREX earnings; NVMI makes acquisition