Shares of Visa (NYSE: V) are trading higher by about 5% as of 3:50 p.m. EDT Thursday after the company reported better-than-expected earnings in the second quarter. Visa's net operating revenue grew to $5.1 billion, up 13% year over year, driven by increased payments volume across its business. Visa is a pure-play payments network, meaning that it makes its money by taking a small slice of every transaction as a fee rather than earning revenue from lending.