Standard Pacific (NYSE: SPF) is up 22% on better-than-expected earnings.

Illumina (NASDAQ: ILMN) is trading higher by 8% on improved guidance.

SiRF Technology (NASDAQ: SIRF) is off 42% on disappointing earnings.

VCA Antech (NASDAQ: WOOF) is down 22% on a weak earnings forecast.

Stocks may trade differently in the pre-market than they do in the regular session.

Douglas A. McIntyre is an editor at 247wallst.com.