Market Close: Big Winners & Losers for March 13, 2013 (SCON, MMUS, SSNI, EGL, XWES, SPPI, SURG, SGMA, STP, VELT)

Superconductor Technologies Inc. (NASDAQ: SCON) is up 70.4% at $3.86.

MakeMusic Inc. (NASDAQ: MMUS) is up 31.1% at $4.85.

Silver Spring Network Inc. (NYSE: SSNI) is up 28.8% at $21.89. This is the stock’s IPO.

Engility Holdings Inc. (NYSE: EGL) is up 18.7% at $23.17.

World Energy Solutions Inc. (NASDAQ: XWES) is up 19.2% at $4.40.

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

Spectrum Pharmaceuticals Inc. (NASDAQ: SPPI) is down 37.3% at $7.79.

Synergetics USA Inc. (NASDAQ: SURG) is down 29.2% at $3.59.

SigmaTron International Inc. (NASDAQ: SGMA) is down 23.4% at $4.71.

Suntech Power Holdings Co. Ltd. (NYSE: STP) is down 23.3% at $0.84.

Velti plc (NASDAQ: VELT) is down 22.8% at $2.40.