There are a number of investment metrics and ratios that help analyze and value convertible bonds.
The conversion value indicates the value of the bond if it is converted at the market price of the shares.
The minimum value of a convertible bond is the greater of
The market conversion premium represents the price investors effectively pay for the underlying shares if they buy the convertible bond and then convert it into shares. Scaled by the market price of the shares, it represents the premium payable when buying the convertible bond rather than the underlying common stock.
Market conversion premium per share = market conversion price – underlying share price
Market conversion premium ratio = Market conversion premium per share / Underlying share price
Premium over straight value = (convertible bond price / straight value) – 1
Valuation of a Convertible Bond
Value of convertible bond = Value of straight bond + Value of call option on the issuer’s stock
Value of callable convertible bond = Value of straight bond + Value of call option on the issuer’s stock –Value of issuer call option
Value of callable putable convertible bond = Value of straight bond + Value of call option on the issuer’s stock – Value of issuer call option + Value of investor put option