Is It Safe? iPhone App Won't Save Sirius

TheStreet.com Ratings looks at a company's risk-and-reward potential in its "Is It Safe?" feature. Look for your stocks at 4 a.m. on Tuesdays and Thursdays.

Sirius XM Radio(SIRI Quote) shares are trading for less than a pack of gum, which isn't a good sign. Satellite radio, which many expected to replace conventional radio, hasn't caught on. Growing competition from podcasts and free Internet radio applications makes the company's prospects look bleak.

Extreme volatility is a side effect of a share price that hovers around 40 cents. Sirius's stock has almost tripled this year, with several peaks and valleys. However, the stock has gained no value this quarter, even as the Nasdaq rose 16%. ...