On 3/28/14, Vanguard Natural Resource LLC's 7.875% Series A Cumulative Redeemable Perpetual Preferred Units ( VNRAP) will trade ex-dividend, for its monthly dividend of $0.1641, payable on 4/15/14. As a percentage of VNRAP's recent share price of $25.70, this dividend works out to approximately 0.64%, so look for shares of VNRAP to trade 0.64% lower — all else being equal — when VNRAP shares open for trading on 3/28/14. On an annualized basis, the current yield is approximately 7.66%, which compares to an average yield of 6.43% in the "Energy" preferred stock category, according to Preferred Stock Channel.As of last close, VNRAP was trading at a 2.84% premium to its liquidation preference amount, versus the average premium of 5.47% in the "Energy" category. The chart below shows the one year performance of VNRAP shares, versus VNR: Below is a dividend history chart for VNRAP, showing historical dividends prior to the most recent $0.1641 on Vanguard Natural Resource LLC's 7.875% Series A Cumulative Redeemable Perpetual Preferred Units: According to the ETF Finder at ETF Channel, Vanguard Natural Resource LLC ( VNR) makes up 9.24% of the Junior MLP ETF (MLPJ) which is trading up by about 0.4% on the day Wednesday. In Wednesday trading, Vanguard Natural Resource LLC's 7.875% Series A Cumulative Redeemable Perpetual Preferred Units ( VNRAP) is currently trading flat on the day, while the common shares ( VNR) are up about 0.7%.