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, technical-services firms topped the hotheads. Not this week. Makers of medical diagnostic equipment are soothing hurting portfolios with a 19.1% average gain over the past 30 days.

Who are the other hotties? Have a look:

  • The LED makers move up to second place, thanks to ever-brighter returns. They're up 16.9% as a group since the second week of May.
  • In third are the subprime lenders. These bottom-tier bankers have come in from the cold with a 16.3% average return over the past month.

According to you, our Foolish readers, the best stocks in these industries to own now -- i.e., those with four or five of the maximum five stars in CAPS -- are:

Company

CAPS Stars

No. of CAPS Ratings

Bullish CAPS Ratings

Bull Ratio

Mindray Medical (NYSE:MR)

*****

484

473

97.7%

Gen-Probe (NASDAQ:GPRO)

*****

54

51

94.4%

Source: Motley Fool CAPS.

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

Company

CAPS Stars

No. of CAPS Ratings

Bearish CAPS Ratings

Bear Ratio

Countrywide Financial (NYSE:CFC)

*

418

224

53.6%

Accredited Home Lenders (NASDAQ:LEND)

*

357

167

46.8%

Impac Mortgage

*

219

96

43.8%

NovaStar Financial (NYSE:NFI)

*

459

177

38.6%

IndyMac Bancorp

*

224

86

38.4%

Fremont General (NYSE:FMT)

*

211

79

37.4%

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:

Mindray Medical is a Rule Breakers pick. Get 30 days of free access to the entire market-beating portfolio, which includes seven stocks that have at least doubled. There's no obligation to subscribe.

Fool contributor Tim Beyers, who is ranked 6,503 out of more than 29,800 rated players in CAPS, didn't own shares in 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 hot stocks, Foolishness, and investing in general may be found in his blog. The Motley Fool's disclosure policy is hotter than city asphalt in the summer heat.