Medivation, Solarfun Power Holdings and Sequenom lead small-cap volume in pre-market

Medivation Inc (Nasdaq:MDVN), Solarfun Power Holdings Co Ltd (Nasdaq:SOLF) and Sequenom Inc (Nasdaq:SQNM) are among the most actively traded companies in Tuesday's trading among companies with market capitalizations under $1 billion.

Also included among the results: Canadian Solar Inc (Nasdaq:CSIQ), ViroPharma Inc (Nasdaq:VPHM), Given Imaging Ltd (Nasdaq:GIVN), True Religion Apparel Inc (Nasdaq:TRLG), Quest Energy Partners L P (Nasdaq:QELP) and RAM Energy Resources Inc (Nasdaq:RAME).

Here are the most actively traded companies among small caps:

		Price at 9:15 ET	Change	% Change	Volume	Year High	Year Low
MDVN	MEDIVATION INC	12.50	+0.44	+3.6%	143.2k	25.06	11.53
SOLF	SOLARFUN POWER HOLDINGS CO L	14.89	+0.10	+0.7%	12.5k	40.19	8.68
SQNM	SEQUENOM INC	17.40	+0.42	+2.5%	10.4k	17.83	4.25
CSIQ	CANADIAN SOLAR INC	33.70	+0.20	+0.6%	9.6k	51.80	6.50
VPHM	VIROPHARMA INC	10.58	-0.25	-2.3%	9.0k	14.94	7.11
GIVN	GIVEN IMAGING	14.39	-0.10	-0.7%	6.5k	30.79	12.88
TRLG	TRUE RELIGION APPAREL INC	26.45	+1.34	+5.3%	5.1k	27.33	13.89
QELP	QUEST ENERGY PARTNERS L P	14.46	-0.41	-2.8%	5.0k	17.60	12.31
RAME	RAM ENERGY RESOURCES INC	5.80	+0.02	+0.3%	4.8k	6.84	4.17
VLTR	VOLTERRA SEMICONDUCTOR CORP	15.35	+0.23	+1.5%	4.8k	17.77	7.79

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