Looking at the universe of stocks we cover at Dividend Channel, on 11/27/15, Nelnet Inc (NNI - Get Report), Pennsylvania Real Estate Investment Trust (PEI), and Trustmark Corp. (TRMK) will all trade ex-dividend for their respective upcoming dividends. Nelnet Inc will pay its quarterly dividend of $0.12 on 12/15/15, Pennsylvania Real Estate Investment Trust will pay its quarterly dividend of $0.21 on 12/15/15, and Trustmark Corp. will pay its quarterly dividend of $0.23 on 12/15/15.

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As a percentage of NNI's recent stock price of $31.48, this dividend works out to approximately 0.38%, so look for shares of Nelnet Inc to trade 0.38% lower — all else being equal — when NNI shares open for trading on 11/27/15. Similarly, investors should look for PEI to open 0.97% lower in price and for TRMK to open 0.91% lower, all else being equal.

Below are dividend history charts for NNI, PEI, and TRMK, showing historical dividends prior to the most recent ones declared.

Nelnet Inc (NNI - Get Report):

NNI+Dividend+History+Chart

Pennsylvania Real Estate Investment Trust (PEI):

PEI+Dividend+History+Chart

Trustmark Corp. (TRMK):

TRMK+Dividend+History+Chart

In general, dividends are not always predictable, following the ups and downs of company profits over time. Therefore, a good first due diligence step in forming an expectation of annual yield going forward, is looking at the history above, for a sense of stability over time. This can help in judging whether the most recent dividends from these companies are likely to continue. If they do continue, the current estimated yields on annualized basis would be 1.52% for Nelnet Inc, 3.90% for Pennsylvania Real Estate Investment Trust, and 3.65% for Trustmark Corp..

In Wednesday trading, Nelnet Inc shares are currently down about 0.1%, Pennsylvania Real Estate Investment Trust shares are down about 0.1%, and Trustmark Corp. shares are off about 0.4% on the day.