Given Warren Buffett's world-famous reputation as one of the greatest investors ever, it's no surprise that individual investors look at his company's public equities portfolio to find stock market inspiration.

Take a peek at Berkshire Hathaway's massive $358 billion portfolio, and you'll quickly realize Apple (NASDAQ: AAPL) makes up 47% of the entire value of its holdings as of this writing. It's not difficult to see why. Berkshire first started buying the iPhone maker in early 2016, and from the start of that year to now, the stock has skyrocketed 600%.

Let's first look at the factors that drew Buffett to Apple. Then, we can figure out whether the shares are a smart investment today.

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Source Fool.com