Sam Mattera

The GPU giant has been a stellar performer in 2016, but risks remain for shareholders.

The small business payment specialist is growing rapidly, but its business model remains risky.

The promise of Zen chips and Polaris GPUs has helped propel the chipmaker's stock in 2016.

AMD's Radeon RX 480 is the company's best chance at growing its GPU market share.

One is a fast-growing consumer electronics company whose sales depend on customers buying a steady stream of new gadgets. The other was founded by Steve Jobs.

Amazon.com has not announced a stock split yet. But as its stock price chart climbs higher, the online retailer could consider a stock split in the future. Over the course of its history, Amazon has split its stock three times.

Fitbit, Box, and Square could be poised for strong growth in the coming quarters.

The hard-drive maker is spending about two-thirds of its operating cash flow on its dividend.

AeroVironment, GoPro, Elbit Systems, and Ambarella could benefit from surging demand for unmanned aerial vehicles.

The maker of Windows 10 is adding new applications and services to its cloud-based subscription service.

Tracking the cybersecurity company's changing revenue, expenses, and profitability.

FireEye's problems may be driven by increasing competition.

Valve's SteamOS is off to a very poor start.

Seagate, Garmin, and HP offer attractive dividends, but could burn shareholders.

The Cupertino tech giant will soon bring Siri to the Mac. That could benefit Microsoft's search engine.

Secretive startup Palantir is a key component of the billionaire investor's portfolio.

2016 operating cash flow, which was expected to total between $70 million and $80 million this year, will be negative.

Rising demand for loans helped propel software and data product revenue.

Fitbit, Twitter, and FireEye have burned shareholders in 2016, but at current levels, they could be bargains.

Which of these two wireless providers should investors add to their portfolios?