I've noticed that people use the term 'slippage' now in a vary vague sense... so depending on whos talking it may mean different things.
Generally, this happens is illiquid markets, when say Renaissance used to purchase S&P Futures a generation ago, the price would slip away from them because it crept higher by sucking away the lower priced sellers (no place else to go but up).
Generally, this happens is illiquid markets, when say Renaissance used to purchase S&P Futures a generation ago, the price would slip away from them because it crept higher by sucking away the lower priced sellers (no place else to go but up).