This is just another step in carnivorous goobermint, no more and no less. Bob Tobin and I went round and round for years on his goofball notion of 'transaction taxes'. The net result of such a tax (which result, btw, I predicted in 1985, in writing) will be the removal of any/all stock/bond/commodity/options/derivatives exchanges from the taxing locales to locales that do not tax transactions. Further, this evolution will take place very nearly immediately unless expressly prohibited by goobermint (not unlikely).
So, get ready for the LIFFE/Euronext Exchange of Mozambique and the Chicago Board Options Exchange of Panama City (the latter location being considerably more likely than the former), and watch trading costs for everyone go up, and rapidly.
Just hope that a worldwide shortage of bandwidth does not eventuate due to the worldwide shortage of brains that the implementation of a transaction tax represents.