名义交易 meaning in English

nominal transaction

If the cost of purchasing the options in " the strategy " exceed the amount which " the strategy " has to notionally purchase such options , the notional amount on the options will be scaled down by a factor , known as position adjustment factor
若按“策略”购买该期权的本金超出按此“策略”必须名义购买这些期权的交易量，则该期权的名义交易量将按一定比例下降，这个比例被称为持仓调整因素。