Warren Buffett plans to give away all of his Berkshire shares within eight years, but he has ended his 20-year-long philanthropic relationship with the Gates Foundation. In a sit-down interview with Becky Quick, Buffett discusses the decision to omit the Gates Foundation from his annual charitable gift. Plus, Buffett explains Berkshire’s expanded stake in Alphabet, and he weighs in on a market driven by speculative trading. In this episode:Becky Quick, @BeckyQuick