Here are today’s five biggest gaining stocks at closing:

Genetic Technologies Ltd. (NASDAQ: GENE) is up 22.8% at $2.75.

Theravance Inc. (NASDAQ: THRX) is up 19.4% at $28.36.

Spar Group Inc. (NASDAQ: SGRP) is up 19.2% at $1.99.

Magal Security Systems Ltd. (NASDAQ: MAGS) is up 18.1% at $4.90.

China Information Technology Inc. (NASDAQ: CNIT) is up 17.8% at $1.59.

And here are today’s five biggest losing stocks at closing:

UniTek Global Services Inc. (NASDAQ: UNTK) is down 49.5% at $1.52.

Golden Star Resources Ltd. (NYSEMKT: GSS) is down 25.1% at $0.94.

Discovery Laboratories Inc. (NASDAQ: DSCO) is down 22.6% at $1.85.

Desarrolladora Homex (NYSE: HXM) is down 19.5% at $6.25.

Ecotality Inc. (NASDAQ: ECTY) is down 19.3% at $0.96.