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 perusing your favorite short and long candidates in each.

Last week, ethanol producers led the laggards, and they're the Fools at the bottom of the hill once again. Stocks in this sector are down 9.6% over the last 30 days.

Who are the others? Have a look:

  • Distillers, which includes bottlers of alcoholic beverages. Stocks in this sector have declined 9% over the last 30 days.
  • Medical diagnostic equipment, which includes makers of gizmos designed to find out what's wrong with you. Stocks in this sector have declined by 8.6% over the last 30 days.

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

Company

CAPS stars (5 max)

No. of CAPS ratings

Bearish CAPS ratings

Bear ratio

Verasun Energy (NYSE:VSE)

*

172

110

63.9%

Aventine Energy (NYSE:AVR)

*

99

58

58.6%

Pacific Ethanol (NASDAQ:PEIX)

*

317

120

37.9%

U.S. BioEnergy (NASDAQ:USBE)

*

17

6

35.3%

Cambridge Heart

*

16

5

31.3%

Source: Motley Fool CAPS

And your favorite long candidates -- i.e., those ranked with three or more stars in CAPS -- are:

Company

CAPS stars

No. of CAPS ratings

Bullish CAPS ratings

Bull ratio

Gen-Probe (NASDAQ:GPRO)

*****

27

27

100.0%

Mindray Medical

*****

265

263

99.2%

Brown Forman (NYSE:BF-B)

*****

29

28

96.6%

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, ranked 660 out of more than 20,600 in CAPS, didn't own shares in any of the companies mentioned in this story at the time of publication. Get the skinny on all the stocks he owns by checking Tim's Fool profile. The Motley Fool's disclosure policy freezes out Wall Street's worst.