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

Last week, ethanol producers were shrinking like Kelly Clarkson's fan base, and they're once again leading the laggards, off by an average of 10.1% over the past 30 days.

In second place, cancer-drug specialists such as Molecular Insight Pharmaceuticals have gone ill. They're down 6.6%, as a group, over the past month.

And finally, the least of the worst: closed-end municipal bond funds, which are punishing portfolios by dropping 6%, as a group, since mid-May.

According to you, our Foolish readers, the worst stocks in these industries to own now -- i.e., those rated one or two out of a maximum five stars in CAPS -- are:

Company

CAPS Stars

No. of CAPS Ratings

Bearish CAPS Ratings

Bear Ratio

Putnam Muni Bond (NYSE:PMG)

*

13

10

76.9%

U.S. BioEnergy (NASDAQ:USBE)

*

144

93

64.6%

Bionovo (NASDAQ:BNVI)

*

22

14

63.6%

Verasun Energy (NYSE:VSE)

*

246

127

51.6%

MGP Ingredients (NASDAQ:MGPI)

*

102

49

48.0%

Aventine Renewable Energy (NYSE:AVR)

*

286

117

40.9%

Pacific Ethanol (NASDAQ:PEIX)

*

417

141

33.8%

Source: Motley Fool CAPS.

And your favorite long candidate -- i.e., rated with four or five stars in CAPS -- is:

Company

CAPS Stars

No. of CAPS Ratings

Bullish CAPS Ratings

Bull Ratio

Celgene

****

460

435

94.6%

Source: Motley Fool CAPS.

Do you agree? Disagree? Let us know what you think by signing up for CAPS today. It's 100% free to participate.

Cap off your day with related CAPS Foolishness:

Fool contributor Tim Beyers, who is ranked 6,103 out of more than 30,300 rated players in CAPS, is a sucker for growth stocks and a regular contributor to David Gardner's Motley Fool Rule Breakers service. Tim didn't own shares of any of the companies mentioned in this story at the time of publication. Tim's portfolio holdings can be found at his Fool profile. His thoughts on growth stocks, Foolishness, and investing in general may be found in his blog. The Motley Fool's disclosure policy freezes out Wall Street's worst.