Applies to convertible securities. Standard provision whereby the conversion ratio is changed accordingly in the case of a stock dividend or extraordinary distribution to avoid dilution of a convertible bondholder's potential equity position. Adjustment usually requires a split or stock dividend in excess of 5% or issuance of stock below book value. Share Purchase Agreements also typically contain anti-dilution provisions to protect investors in the event that a future round of financing occurs at a valuation that is below the valuation of the current round.