security
(5) The term security shall include any security defined as such pursuant to section 3(a)(10) of the Act, but shall exclude any class of security having a preference or priority over the issuer's common stock as to dividends, interest payments, redemption or payments in liquidation, if the voting rights of such securities only become effective as a result of specified events, not relating to an acquisition of the common stock of the issuer, which reasonably can be expected to jeopardize the issuer's financial ability to meet its payment obligations to the holders of that class of securities.