10 things you need to know before the opening bell

4:23am PDT - May 20th, 2020    dow jones - Business Insider

Here's what you need to know before the markets open.  1. 'Buffett needs to listen to Buffett again': Investor was wrong to recommend tech-heavy S&P 500, Berkshire Hathaway shareholder says. "He is forgetting what gruesome looks like by fawning on the index a…