A tax of less than half a percent on every $100 of stock sales or sales of other financial instruments including bonds, derivatives, and options. The tax could raise anywhere from $170 billion to $350 billion per year depending how it was applied. Extend that over 10 years, and we are raising almost what the White House and Republicans agree needs to be raised in order to accomplish the objectives of a grand bargain.
Eliot Spitzer blog on Slate 12/03/2012