Sirius (SIRI) The company and its shareholders have every reason to be upset. The shares drop to $3.02 with no news to push them down when the market is up big. The 52-week high is $5.33.

Clearwire (CLWR) WiMax is supposed to be hot. Clearwire is the big IPO in the territory. Down to $18.12. The 52-week high is $27.95. Investors are concerned about when those customers will start signing up by the ton.

Radcom (RDCM) Builds test and quality management equipment for data communications networks. Sounds too complicated. Company has loss in last quarter. Down to $1.60 from 52-week high of $3.30.

Healthtronics. (HTRN) Medical equipment maker Company is going through restructuring and change in strategic direction. Down to $4.91 from 52-week high of $8.60.

Douglas A. McIntyre