Billionaire Warren Buffett has always had a thing for companies that return capital to their shareholders. Passive income can compound into vast sums of wealth and make money productive as investors wait for a stock to appreciate.Buffett's company Berkshire Hathaway owns several high-yielding stocks in its portfolio. However, of the 45 stocks and exchange-traded funds exchange-traded funds (ETFs) Berkshire owns, only one has a dividend yield above 5% -- and it's a stock Buffett has owned for over a decade.O ...