Looking at the universe of stocks we cover at Dividend Channel, on 12/6/13, Occidental Petroleum Corp ( OXY) will trade ex-dividend, for its quarterly dividend of $0.64, payable on 1/15/14. As a percentage of OXY's recent stock price of $94.26, this dividend works out to approximately 0.68%, so look for shares of Occidental Petroleum Corp to trade 0.68% lower — all else being equal — when OXY shares open for trading on 12/6/13.Below is a dividend history chart for OXY, showing historical dividends prior to the most recent $0.64 declared by Occidental Petroleum Corp: In general, dividends are not always predictable; but looking at the history above can help in judging whether the most recent dividend from OXY is likely to continue, and whether the current estimated yield of 2.72% on annualized basis is a reasonable expectation of annual yield going forward. The chart below shows the one year performance of OXY shares, versus its 200 day moving average: Looking at the chart above, OXY's low point in its 52 week range is $72.69 per share, with $99.42 as the 52 week high point — that compares with a last trade of $94.54. According to the ETF Finder at ETF Channel, OXY makes up 7.35% of the Unconventional Oil & Gas ETF ( FRAK) which is trading higher by about 0.1% on the day Wednesday. In Wednesday trading, Occidental Petroleum Corp shares are currently trading flat on the day.