Looking at the universe of stocks we cover at Dividend Channel, on 5/6/13, Columbia Banking System, Inc. ( COLB) will trade ex-dividend, for its quarterly dividend of $0.10, payable on 5/22/13. As a percentage of COLB's recent stock price of $21.09, this dividend works out to approximately 0.47%.Below is a dividend history chart for COLB, showing historical dividends prior to the most recent $0.10 declared by Columbia Banking System, Inc.: In general, dividends are not always predictable; but looking at the history above can help in judging whether the most recent dividend from COLB is likely to continue, and whether the current estimated yield of 1.90% on annualized basis is a reasonable expectation of annual yield going forward. The chart below shows the one year performance of COLB shares, versus its 200 day moving average: Looking at the chart above, COLB's low point in its 52 week range is $16.18 per share, with $22.08 as the 52 week high point — that compares with a last trade of $21.09. According to the ETF Finder at ETF Channel, COLB makes up 2.55% of the KBW Regional Banking Portfolio ETF ( KBWR) which is trading up by about 0.1% on the day Thursday. In Thursday trading, Columbia Banking System, Inc. shares are currently up about 0.4% on the day.