Looking at the universe of stocks we cover at Dividend Channel, on 6/26/13, National Fuel Gas Co. ( NFG) will trade ex-dividend, for its quarterly dividend of $0.375, payable on 7/15/13. As a percentage of NFG's recent stock price of $57.73, this dividend works out to approximately 0.65%, so look for shares of National Fuel Gas Co. to trade 0.65% lower — all else being equal — when NFG shares open for trading on 6/26/13.Below is a dividend history chart for NFG, showing historical dividends prior to the most recent $0.375 declared by National Fuel Gas Co. : In general, dividends are not always predictable; but looking at the history above can help in judging whether the most recent dividend from NFG is likely to continue, and whether the current estimated yield of 2.60% on annualized basis is a reasonable expectation of annual yield going forward. The chart below shows the one year performance of NFG shares, versus its 200 day moving average: Looking at the chart above, NFG's low point in its 52 week range is $43.82 per share, with $64.58 as the 52 week high point — that compares with a last trade of $57.59. According to the ETF Finder at ETF Channel, NFG makes up 1.18% of the Unconventional Oil & Gas ETF ( FRAK) which is trading lower by about 2.1% on the day Monday. In Monday trading, National Fuel Gas Co. shares are currently down about 0.8% on the day.