Hybrid instruments - essentially bonds with an equity component - are found in a multitude of guises. This generic heading encompasses a seemingly endless array of finance instruments, including convertible bonds, mandatory convertibles, reverse convertibles, preferred shares, ELKS, DECS and LYONs, Within each one of these instruments are found a wide range of variations and features. These include reset, negative pledge, screw and forced conversion clauses, as well as step up coupons, call schedules, call options with soft and hard protection, etc.

The range of possibilities can seem...