The Potential Revenue from Financial Transactions Taxes
December 2009, Dean Baker, Robert Pollin, Travis McArthur, and Matt Sherman
This joint report by CEPR and the Political Economy Research Institute (University of Massachusetts, Amherst) gives an estimate of $177-354 billion in revenue that could be raised by taxing financial transactions in the United States.
Report - PDF | Flash
See more about Financial Speculation Taxes (a.ka. Financial Transactions Taxes)