Welcome back to another Foolish review of the hottest stocks, as ranked by Motley Fool CAPS. We're looking at the three best-performing industries over the past 30 days and your favorite long and short candidates in each.

Last time, gaming stocks such as The9 (NASDAQ:NCTY) and Shuffle Master (NASDAQ:SHFL) were cashing in. They've since folded, leaving renewable-energy firms raking in the chips.

No, really. So hot are the green gurus that biofuel specialist Verenium (NASDAQ:VRNM) and its peers took all three spots in this week's list. Each group was up at least -- wait for it -- 60% over the past 30 days.

According to you, our Foolish readers, the best stock (yup, only one) in these industries to own now -- i.e., the one with four or five of the maximum five stars in CAPS -- is:

Company

CAPS Stars

No. of CAPS Ratings

Bull Ratio

30-Day Price Change

Archer Daniels Midland (NYSE:ADM)

****

1,015

92.9%

26.0%

Sources: Motley Fool CAPS and Yahoo! Finance, as of Dec. 21.

And your favorite short candidates -- i.e., those rated with one or two stars in CAPS -- are:

Company

CAPS Stars

No. of CAPS Ratings

Bear Ratio

30-Day Price Change

U.S. BioEnergy

*

251

58.2%

78.2%

BioFuel Energy (NASDAQ:BIOF)

*

56

57.1%

68.0%

VeraSun Energy (NYSE:VSE)

*

371

50.1%

80.9%

Aventine Renewable Energy

*

385

49.1%

66.9%

Pacific Ethanol (NASDAQ:PEIX)

*

611

44.0%

107.4%

Sources: Motley Fool CAPS and Yahoo! Finance, as of Dec. 21.

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Fool contributor Tim Beyers, who is ranked 10,028 out of more than 78,000 participants in CAPS, didn't own shares in any of the companies mentioned in this article at the time of publication. Find Tim's portfolio here and his latest blog commentary here. The Motley Fool's disclosure policy is hotter than city asphalt in the summer heat.