Warren Buffett, who ended his legendary run as the CEO of Berkshire Hathaway at the end of last year, looked to buy and hold businesses that have economic moats. This term helps to explain durable competitive advantages that a company has that allow it to succeed over time. His philosophy worked extremely well. The tech sector is full of businesses that fit the criteria. After avoiding making bets in this sector, Buffett finally expanded his focus and bought Apple in early 2016. Berkshire also added Amazon ...

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