This portfolio can be used to embrace all manner of investments such as Bonds, Commodities, Equity, Foreign Exchange, Loans and Options plus less transparent assets such as Derivatives, Exchange Traded Funds, Film Box Office Sales Human Resources, Real Estate, Structured Products, Trade Marks, Patent and Marketing Rights.

FORBES: Innovation In Investment Vehicles

Some firms have separate systems for different asset classes, such as foreign exchange, equities, and options.

FORBES: Chicago's Sun Trading Consolidates Asset Classes on Kx

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