The Best Warren Buffett Stock to Buy With $100 Right Now

American Express -- a top Berkshire Hathaway portfolio holding -- is an extremely high-quality company.Thanks to his remarkable track record leading Berkshire Hathaway over the decades, Warren Buffett has become a legend in the financial world. It's no wonder that individual investors pay close attention to his moves to find potential ideas for their own portfolios.The conglomerate's massive $367 billion equity portfolio now includes stakes in dozens of businesses. But I think one holding of the Oracle of O ...