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, makers of organic light-emitting diodes were all aglow and they're still smiling bright, up an average of 23.6% over the past 30 days.

Our other two hotheads are new entrants. Robot stocks rank second, up 15.9% since mid-July, while minimally invasive medical equipment makers are third with a 9.9% average return over the same period.

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

McKesson

(NYSE:MCK)

*****

135

133

98.5%

Universal Display Tech.

****

400

380

95.0%

Intuitive Surgical

(NASDAQ:ISRG)

****

1,276

1,209

94.7%

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

CONMED

(NASDAQ:CNMD)

*

21

8

38.1%

Arrow International

(NASDAQ:ARRO)

**

33

6

18.2%

AngioDynamics

(NASDAQ:ANGO)

**

62

11

17.7%

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 6,825 out of more than 60,000 participants in CAPS, didn't own shares in any of the companies mentioned in this story at the time of publication. Find Tim's portfolio here and his latest blog commentary here. Intuitive Surgical and Universal Display are both Rule Breakers picks. The Motley Fool's disclosure policy is hotter than city asphalt in the summer heat.