10 things you need to know before the opening bell

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 and some 'obvious' winners of today," wrote Tony Scherrer in a...