Financial technology companies, also known as fintechs, have obvious appeal. Whereas traditional financial businesses -- banks or insurers, for example -- make their money by taking risks, fintechs make their money primarily by providing services for a fee. And whereas many traditional financials can only grow as fast as their balance sheets, fintechs have fewer hard limits on their growth. Below, three Fool.com contributors explain why they see BlackLine (NASDAQ: BL), American Express (NYSE:...

Many worry that Berkshire Hathaway (NYSE: BRK-A) (NYSE: BRK-B) is simply too big to outperform, even with one of the world's greatest investors calling the shots. But if it can continue to find special situations like that of Home Capital Group (TSX: HCG), Berkshire may be able to outperform the market for a very long time. In a very special deal, Berkshire bought into the bank at a discount and sold at a premium, a move that only the Oracle of Omaha could make. Getting paid for the Buffett...

Berkshire Hathaway (NYSE: BRK-A)(NYSE: BRK-B) is home to many excellent insurance companies. GEICO and its BH Reinsurance unit come to mind as some of the biggest, and certainly the best in their respective markets. But when it comes to underwriting profits, at least over the last decade or so, few have topped its fastest-growing insurance unit, Berkshire Hathaway Primary Group. The mashup of insurance companies that are reported on a combined basis as BH Primary Group don't get much press....