Posted in Web Berkshire Hathaway Inc. (NYSE:BRK-A), Berkshire Hathaway … January 25, 2022 Dave Portnoy on Warren Buffett, June 9th, 2020 (screen capture via Twitter). Berkshire Hathaway Hits An All-Time High Back in June of 2020, Dave Portnoy was a few months into his day trading career. https://www.benzinga.com/trading-ideas/22/01/25076154/the-old-mans-still-got-it-warren-buffetts-berkshire-hathaway-hits-an-all-time-high-but-is-still-vul