How does Warren Buffett invest without leverage or borrowing?

Warren Buffett invests big in billions at a time and he don't use leverage or borrow money from wealthy investors like hedge funds do. So, my question is that, where does he find the money to invest that big. I know he has his own savings but he's not having as much as he invest in his saving. How does he... show more Warren Buffett invests big in billions at a time and he don't use leverage or borrow money from wealthy investors like hedge funds do. So, my question is that, where does he find the money to invest that big. I know he has his own savings but he's not having as much as he invest in his saving. How does he do it?
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