Europe markets seen slightly lower ahead of big day for data and earnings By: CNBC.com News July 31, 2018 at 01:47 AM EDT Major European bourses are set to open in the red by a slim margin on Tuesday ahead of a slew of data and corporate releases. Read More >> Related Stocks: Amazon.com Apple Camden Natl Corp Deutsche Lufthansa S ADR FTSE 100 Index Facebook GX DAX Germany ETF Netflix Pfizer Procter & Gamble