Dividend investing is popular again. Investors have taken to heart Jeremy Siegel's studies, which show that higher-yielding stocks tend to offer greater returns over time than low- or no-yield stocks.

The highest dividend yields can be very tantalizing. As long as a stock yielding 15% doesn't lose value, you'll make 15% in one year! In more cases than not, however, an astronomical yield is a bad sign for a stock. Since dividend yields and stock prices move in opposite directions, a high yield usually means that investors have begun to worry about the business and driven down its stock price.

However, certain types of companies such as REITs have to pay out most of their income as dividends, so their yields will be higher than "normal." Dividends are not guaranteed; you need to make sure that a business is generating enough cash to pay its dividend, or your investment could be disastrous.

Three months ago, I ran a screen for the highest-yielding stocks, and it got such a good reception that I'm doing it again this quarter. The only limitation I've set, this time, is the dividend stocks must have a market cap greater than $500 million.

Here are the top 25 highest-yielding stocks the screen produced:

Rank

Company Name

Dividend Yield

Market Cap (millions)

1 American Capital Agency (Nasdaq: AGNC)          19.6% $1,451.4
2 PDL BioPharma (Nasdaq: PDLI)          19.2% $753.0
3 Invesco Mortgage Capital (NYSE: IVR)          18.5% $841.2
4 Cypress Sharpridge Investments (NYSE: CYS)          18.4% $593.6
5 Chimera Investment (NYSE: CIM)          17.6% $3,568.0
6 Annaly Capital Management (NYSE: NLY)          15.4% $10,985.3
7 Hatteras Financial (NYSE: HTS)          15.0% $1,363.7
8 Anworth Mortgage Asset (NYSE: ANH)          13.1% $831.3
9 Prospect Capital (Nasdaq: PSEC)          12.2% $791.0
10 MFA Financial (NYSE: MFA)          11.4% $2,244.4
11 Teekay Tankers (NYSE: TNK)          11.4% $628.4
12 BlackRock Kelso Capital (Nasdaq: BKCC)          10.9% $861.5
13 Solar Capital (Nasdaq: SLRC)          10.8% $757.9
14 Frontline (NYSE: FRO)          10.4% $2,246.2
15 World Wrestling Entertainment (NYSE: WWE)          10.4% $1,014.6
16 Cellcom Israel (NYSE: CEL)          10.3% $3,263.9
17 Capitol Federal Financial (Nasdaq: CFFN)          9.83% $1,765.4
18 Encore Energy Partners LP (NYSE: ENP)          9.77% $929.1
19 Knightsbridge Tankers Limited (Nasdaq: VLCCF)          9.23% $533.3
20 Nordic American Tanker Shipping (NYSE: NAT)          9.22% $1,250.3
21 Provident Energy Trust (NYSE: PVX)          9.15% $2,052.9
22 Capstead Mortgage (NYSE: CMO)          9.12% $800.2
23 Navios Maritime Partners L.P. (NYSE: NMM)          8.90% $939.4
24 Cheniere Energy Partners LP. (NYSE: CQP)          8.86% $3,028.9
25 Mesabi Trust (NYSE: MSB)          8.79% $503.9

Source: Capital IQ, a division of Standard & Poor's.

These stocks are a good place to start your research, but they're not formal recommendations. Remember, their seemingly irresistible yields could be ticking time bombs, so do your own due diligence. Also, make sure you diversify your picks across various sectors. As investors relearn every decade or so, you never want to put all your eggs in one basket -- no matter how tempting the dividends are.

For a basket of some high-yield some dividend opportunities, click here to get The Motley Fool's five-page free report: 13 High-Yielding Stocks to Buy Today.

Dan Dzombak recommends you read The Best Investment Advice You Will Ever Get If You Have Under $100k. His musings and articles he finds interesting can be found on his Twitter: @DanDzombak. He does not own any of the stocks mentioned in this article.

Cellcom Israel is a Motley Fool Global Gains pick. The Fool owns shares of Annaly Capital Management. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.