Helicos BioSciences, EXFO Electro-Optical Engineering and Green Plains Renewable Energy lead small-cap percentage gainers

Helicos BioSciences Corp. (Nasdaq:HLCS), EXFO Electro-Optical Engineering (Nasdaq:EXFO) and Green Plains Renewable Energy Inc. (Nasdaq:GPRE) are among the biggest percentage gainers in Wednesday's trading among companies with market capitalizations under $750 million.
Evans Bancorp Inc. (Nasdaq:EVBN), Packeteer, Inc. (Nasdaq:PKTR) and The Talbots, Inc. (NYSE:TLB) are also among the top small-cap percentage gainers.
Here are Wednesday's biggest percentage gainers:
| Price at 12:54 ET | Change | % Change | Volume | Year High | Year Low | ||
| HLCS | HELICOS BIOSCIENCES CORP | 7.86 | +1.45 | +22.6% | 9.9k | 18.60 | 4.75 |
| EXFO | EXFO ELECTRO OPTICAL ENGR IN | 5.60 | +0.75 | +15.5% | 177.6k | 7.83 | 3.75 |
| GPRE | GREEN PLAINS RENEWABLE ENERG | 8.85 | +1.18 | +15.4% | 4.6k | 23.35 | 6.69 |
| EVBN | EVANS BANCORP INC | 17.50 | +2.15 | +14.0% | 1.9k | 20.49 | 13.28 |
| PKTR | PACKETEER INC | 5.95 | +0.72 | +13.8% | 1,943.8k | 10.52 | 3.81 |
| TLB | TALBOTS INC | 13.44 | +1.43 | +11.9% | 1,069.8k | 26.10 | 6.48 |
| SMSI | SMITH MICRO SOFTWARE INC | 7.23 | +0.75 | +11.6% | 640.9k | 21.20 | 4.44 |
| SOLF | SOLARFUN POWER HOLDINGS CO L | 13.73 | +1.42 | +11.5% | 4,938.1k | 40.19 | 8.22 |
| CSUN | CHINA SUNERGY CO LTD | 8.34 | +0.85 | +11.3% | 1,278.1k | 19.23 | 4.83 |
| NEXS | NEXXUS LIGHTING INC | 6.64 | +0.64 | +10.6% | 15.1k | 7.49 | 3.13 |









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