Investors looking for a no-brainer dividend stock to buy and hold for the long run should look at Warren Buffett and the banking industry. During the first two quarters of 2023, Buffett's holding company Berkshire Hathaway bought about 12.5 million shares of Capital One Financial (COF -1.32%).Buffett will be the first to warn everyday investors that not every stock pick Berkshire makes works out as intended. That said, following Buffett's lead by acquiring Capital One stock could be a smart move. Despite ri ...