SiriusXm

Internet radio has never been as popular as it is right now, and market leader Pandora continues to grow at a heady pace. It has seen its shares of the total U.S. radio-listening market nearly double to 5.55%. That's the upbeat song. But here come the blues.

News items to watch next week include Groupon's long-awaited IPO, the release of Take-Two Interactive's Grand Theft Auto V, Dunkin' Brands second-ever quarterly report, and more from car rental companies to satellite radio.

Folks have been writing off Sirius XM Radio for years. Competitor Pandora is flashier, and has been growing faster than its peers. But it's also been losing money, while the far-less-expensive Sirius is making a profit. Here's why investors should swap Pandora shares for Sirius.

Plenty of big names are set to report their earnings in August, including the country's largest cable and satellite television providers, several of China's leading dot-coms, radio giant Sirius XM, car rental companies Zipcar and Avis, and the two biggest video game developers.

Earnings season is near, and investors, as always are worried. Don't fret too much, though: Odds are that your company will come out on top on the bottom line -- because most do. But what will separate the winners from the whiners for the coming quarter? Here are the three key factors.

Among Wednesday's top online stories for investors: Why did Warren Buffett invest in BYD? How does the market usually fare on a blizzard day? And what I learned from working with Jim Cramer.

Things are looking up at Sirius-XM. 'Shock Jock' Howard Stern is expected to stay with the satellite radio giant, where he reportedly earns more than $100 million a year. Plus, revenue is expected to rise nearly 7% in the fourth quarter, although the company will still report a loss.