IMPLEMENTATION SHORTFALL

In trading, difference between the decision price or value when making a buying or selling decision regarding a security, and final execution price of value after considering all commissions, fees, and taxes. It is the total of execution and opportunity costs incurred in the event an untoward market movement between the time of the trading decision and order execution. Investors keep it as low as possible because it can drastically impact final profits from trading. Also known as slippage.