The average investor can improve his or her potential for returns by following successful investment managers. And there's perhaps no one better to look to than the great Warren Buffett.

The company that the Oracle of Omaha heads, Berkshire Hathaway, has a massive equity portfolio worth $370 billion. Among the numerous holdings, it's easy to notice that (NASDAQ: AAPL) currently represents a whopping 48% of the total.

Let's try to figure out the reasons why Buffett first bought shares in the tech giant, and then assess whether Apple is a smart stock to buy right now.

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Source Fool.com