A stipulation in a convertible issue that allows the issuer to call the issue during the noncall period if the price of the stock reaches a certain level. In the case of convertible securities, right of an issuer to accelerate the first redemption date if the underlying common should trade at or above a certain level for a sustained period. Most typical terms are 150% of conversion price for 20 consecutive days. Note that under these circumstances the security has appreciated, at a minimum, 50% since being issued.