Dictionary of Finance and Investment Terms: All Or None (AON)
All Or None (AON)
Investment banking: an offering giving the issuer the right to cancel the whole issue if the underwriting is not fully subscribed.
Securities: buy or sell order marked to signify that no partial transaction is to be executed. The order will not automatically be canceled, however, if a complete transaction is not executed; to accomplish that, the order entry must be marked FOK, meaning Fill Or Kill.
