JDS Uniphase Corp. (Nasdaq: JDSU) shares climbed 7.1% to $24.47, on volume of 24.5 million shares, compared to a daily average of 5.4 million. The maker of optical networking equipment reported great earnings last week, and shares are up an astonishing 36% since then.

Sirius XM Radio Inc. (Nasdaq: SIRI) traded in 30 million shares Wednesday, still trailing its daily average of 49.1 million. Prices dipped 0.8% to $1.77, after the company hinted revenues will beat expectations on next week’s release of “Valentine’s Radio,” a four-day, limited-run channel.

USANA Health Sciences Inc. (NYSE: USNA) shares faded 12.5% to $35.20 Wednesday. Volume of 273,149 shares towered over a full-day average of 41,636, after announcing its fourth-quarter profit improved 21% over the year before.