Offer your thoughts or opinion on the input financial query or topic using your financial background.

Do stock prices really go down by the amount of the dividend?
Here is one study http://rfs.oxfordjournals.org/content/7/4/711.short I quote from the abstract  "In a variety of tests, marginal price drop is not significantly   different from the dividend amount. Thus, over the last several   decades, one-for-one marginal price drop has been an excellent   (average) rule of thumb."