Chasing highfliers is a sucker's game. But tracking monthly trends across the market can lead to great investment ideas, as well as shed new light on stocks you already have in your portfolio.

Let's take a look at the biggest movers in the Mid Caps. These stocks -- which include companies from the consumer discretionary, energy, financials, materials, and telecommunication sectors -- have clocked some of the biggest gains during the past month.

Mid-Cap Market Movers

Company

Industry

CAPS Rating
(out of 5)

30-Day Return

Market Cap

Price / Earnings

Fifth Third Bancorp (NASDAQ:FITB)

Commercial Banks

**

27.6 %

9.91B

11.57

Sirius XM Radio (NASDAQ:SIRI)

Media

**

40.3%

3.31B

NA

Genworth Financial (NYSE:GNW)

Insurance/Financial Services

***

21.9%

6.88B

NA

Katy Industries

Diversified Telecommunication Services

***

25.6%

5.52B

15.46

KeyCorp

(NYSE:KEY)

Commercial Banks

**

29.4%

6.38B

NA

Those returns are certainly eye-catching. But do these highfliers have staying power?

Let's see what The Motley Fool CAPS community (more than 145,000 investors strong) has to say about the best plays in the Mid Cap market.

And the next big winners are ...
The following Mid Cap stocks are of similar size in comparable industries to the ones in the previous chart. However, these are companies CAPS members think have more promising future returns than the ones already making waves.

 CAPS Community Mid Cap Favorites

Company

Industry

CAPS Rating (out of 5)

Market Cap

Price / Earnings

Fools Saying Outperform

SEI Investments

(NASDAQ:SEIC)

(Alternative to FITB and KEY)

Capital Markets

*****

3.36B

24.57

239 of 249

DreamWorks Animation SKG (NASDAQ:DWA)

(Alternative to SIRI)

Media

****

3.34B

21.31

632 of 681

Reinsurance Group of America

(NYSE:RGA)

(Alternative to GNW)

Insurance

****

3.54B

11.46

60 of 67

Telenor ASA

(Alternative to KT)

Diversified Telecommunication Services

*****

21.55B

11.43

69 of 70

Of course, some of today's winners might continue to rack up outsized returns. But isn't it better to snag tomorrow's winners before they start running up?

Find out if your hot stocks still have sizzle
How do your stocks compare to the CAPS community's best investment ideas? Find out in an instant by plugging your tickers into the completely free Motley Fool Stocks360 program. You'll also get a thorough analysis of how your investments are faring against multiple peer benchmarks. Find out whether you should trade in, trade up, or sit tight by getting a quick 360-degree diagnostic right now.

Disclosure is important to us here at The Motley Fool. The stocks mentioned in this article received their CAPS ratings from participants in the Motley Fool's CAPS service. No individual person selected the stocks in this article, so there is no author to disclose an interest in them. Since this article was automatically generated by identifying the stocks rated by the CAPS community and by buyers in today's market, it is possible that Motley Fool personnel (and even The Motley Fool itself, through our Million Dollar Portfolio, Motley Fool Pro, and Ready Made Millionaire services) have positions in these stocks. Our lawyers make us put all this at the bottom of this article. You can learn more about The Motley Fool's disclosure policy.