Market Close: Big Winners & Losers for March 14, 2013 (ABIO, SSNI, KWK, DYNT, MW, VHC, SCON, VELT, OPTT, VRS)

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

ARCA biopharma Inc. (NASDAQ: ABIO) is up 44.4% at $3.32.

Silver Spring Network Inc. (NYSE: SSNI) is up 29.4% at $22.00.

Quicksilver Resources Inc. (NYSE: KWK) is up 26.9% at $2.74.

Dynatronics Corp. (NASDAQ: DYNT) is up 19.4% at $2.81.

Men's Wearhouse Inc. (NYSE: MW) is up 18.5% at $34.46.

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

VirnetX Holding Corp. (NYSEMKT: VHC) is down 28.9% at $25.35.

Superconductor Technologies Inc. (NASDAQ: SCON) is down 16.8% at $3.21.

Velti plc (NASDAQ: VELT) is down 16.4% at $2.01.

Ocean Power Technologies Inc. (NASDAQ: OPTT) is down 15.4% at $1.65.

Verso Paper Corp. (NYSE: VRS) is down 14.1% at $1.42.

Filed under: 24/7 Wall St. Wire, HI/LOW, Market Close Tagged: ABIO, DYNT, KWK, MW, OPTT, SCON, SSNI, VELT, VHC, VRS