Looking at the universe of stocks we cover at Dividend Channel, on 2/19/14, Northern Tier Energy LP ( NTI) will trade ex-dividend, for its quarterly dividend of $0.41, payable on 2/28/14. As a percentage of NTI's recent stock price of $25.06, this dividend works out to approximately 1.64%, so look for shares of Northern Tier Energy LP to trade 1.64% lower — all else being equal — when NTI shares open for trading on 2/19/14.Below is a dividend history chart for NTI, showing historical dividends prior to the most recent $0.41 declared by Northern Tier Energy LP: In general, dividends are not always predictable; but looking at the history above can help in judging whether the most recent dividend from NTI is likely to continue, and whether the current estimated yield of 6.54% on annualized basis is a reasonable expectation of annual yield going forward. The chart below shows the one year performance of NTI shares, versus its 200 day moving average: Looking at the chart above, NTI's low point in its 52 week range is $17.83 per share, with $33.24 as the 52 week high point — that compares with a last trade of $25.10. According to the ETF Finder at ETF Channel, NTI makes up 2.75% of the Dynamic Energy Exploration & Production Portfolio ETF ( PXE) which is trading up by about 0.9% on the day Tuesday. In Tuesday trading, Northern Tier Energy LP shares are currently off about 0.1% on the day.