Bank of America

Bank of America made Warren Buffett proud in 2019. As consumers propped up the economy during the year, BofA benefitted from having doubled down on its consumer businesses. Shares rose 46% over the course of the year and added billions in value for Berkshire Hathaway, the company's largest shareholder. Even net interest income, which normally suffers when interest rates are low, rose 2% during the year, to $48.9 billion, as the bank focused on making a higher volume of loans while keeping expenses flat.