21 . A mutual fund's operating Casts Expressed as a percentage of the total average BEGETS is called the .. &. management EXPENSE ratio & . net asset Value C. trailer for ratio . &. load fees . &. Sales charges rating. ZZ_ Securities firms that service bath retail institutions and corporate customers are called &. discount brokers . D . broker- dealers . C. integrated firms . J. corporate finance firms. &. dealers . {} . Buying an asset in one market at and price and selling it immediately in another market at another price is called .. &. Program trading . & _ position trading . C. pure arbitrage trading* J. risk arbitrage trading* {. principal transaction trading