This is a discretionary charge applied by an OEIC which is displayed as a separate, explicit charge. This allows the fund manager to apply the levy to those investors who have caused the fund to incur dealing costs, ie. buyers may be required to pay a dilution levy on top of the price of the share, whilst sellers may have to deduct a dilution levy from the amount they receive per share. This would be in addition to the initial charge for a buyer and possibly an exit charge for the seller.