Warren Buffett is one of the world's most admired investors. He has built an unshakable legacy on the back of his long-term approach to the stock market, typically sticking with businesses he understands, and those that generate reliable growth and profitability.

His Berkshire Hathaway investment company has adopted many of those same principles in managing its $342 billion portfolio, though some of Buffett's lieutenants occasionally delve into opportunities outside his main areas of expertise.

Two of those companies are now rapidly developing artificial intelligence (AI), and Berkshire has a front-row seat as they make inroads into this new, game-changing industry. But for investors, only one of those stocks might be worth buying right now.

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Source Fool.com