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fin.convertible-bond-premium Calculator
Calculates the conversion premium and conversion parity for a convertible bond relative to the current stock price. Conversion premium is the extra you pay over conversion value for the bond's downside protection — it should compress as the stock rises toward the conversion price.
Inputs
Bond Market Price
Current trading price. For bonds, rises when interest rates fall and drops when rates rise.
Conversion Ratio
Reference formula or conversion factor shown for context.
Stock Price
Current price per share. Used in P/E ratios, options pricing, and market cap calculations.
Par Value
The nominal stated value of the security. For bonds, this is the amount repaid at maturity.
Coupon Rate Pct
Annual interest a bond pays on its face value. A 5% coupon on a $1,000 bond pays $50/year regardless of what the bond trades for in the market.
Results
conversion value ($)
The computed numeric or monetary value.
conversion premium
The price paid for the option or insurance coverage. Option premium = intrinsic value + time value + volatility premium.
conversion price ($/share)
The computed or recommended price.
straight bond value (approx $)
The computed numeric or monetary value.
in-the-money?
Sample size or count used in the calculation.
conversion premium = (bond price - conv value)/conv value
Current fair value of the bond. Bond prices move inversely to interest rates — when rates rise, existing bonds fall in value.