NYSE, now with Euronext under its belt, is seen buying a U.S. futures exchange or another foreign equity exchange.

FORBES: Intelligent Investing Briefing Book

Futures markets determine foreign exchange rates, and in a world of gyrating currency values there are serious questions about whether they are the best way to determine the relative value of dollars, euros and yen.

WSJ: Book Review: The Futures

The most popular instruments are foreign currency futures on the Chicago Mercantile Exchange.

FORBES: In The Money

The economy is improving, but Jessica Hoversen, a foreign exchange and fixed-income futures analyst at MF Global, warns that the currency market may have already overextended itself in the short term, while long-term trends endanger the U.S. dollar.

FORBES: Magazine Article

The markets that do the sort of high volume, low margin trades that would be affected by an FTT are the foreign exchange (FX), futures, options and stock markets (with special reference to high frequency trading of the often demonised computer algorithm type).

FORBES: The Stupidity of the Robin Hood Tax Reaches America