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Bond Price from YTM

Computes the price of a coupon bond from its yield to maturity, discounting all future coupons and the face value to present: P = C·[1 − (1+i)^(−n)]/i + F·(1+i)^(−n). It's the inverse of computing the YTM and the foundation of fixed-income pricing. When the coupon exceeds the YTM, the bond trades at a premium; when below, at a discount. The calculation divides coupon and yield by the payment frequency. Enter the face value, the coupon rate, the YTM, the years and the coupons per year.

Result

Bond Price from YTM

Computes the price of a coupon bond from its yield to maturity, discounting all future coupons and the face value to present: P = C·[1 − (1+i)^(−n)]/i + F·(1+i)^(−n). It's the inverse of computing the YTM and the foundation of fixed-income pricing. When the coupon exceeds the YTM, the bond trades at a premium; when below, at a discount. The calculation divides coupon and yield by the payment frequency. Enter the face value, the coupon rate, the YTM, the years and the coupons per year.

From yield back to price

Everyone learns to compute a bond's yield from its price. The reverse path is just as important and more common day to day: given a market yield, what is the paper worth? The answer is to bring each future coupon and the face value to present value, discounting everything at the required rate. It's the foundation of all fixed-income pricing.

The relationship between coupon and yield decides whether the bond trades at a premium or a discount. When the coupon pays more than the market yield, the paper is worth more than face and trades at a premium. When it pays less, it trades at a discount. And when the two match, the price hits face value exactly. This balance is what makes bond prices fall when rates rise.

Enter the face value, the coupon rate, the YTM, the years to maturity and how many coupons the bond pays per year. The tool divides coupon and yield by the frequency, adds the present value of the coupon stream to that of the principal and returns the price, flagging premium or discount. The calculation assumes settlement on a coupon date, with no accrued interest.

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Bond Dirty Price

Computes the dirty price of a bond: the clean price plus the interest accrued since the last coupon. The clean price is what shows up in quotes, but what actually changes hands at settlement is the dirty price, because the buyer has to reimburse the seller for the interest already run up. The tool works out the accrued interest on a linear basis and adds it to the clean price, returning both parts. Enter the clean price, the face value, the annual coupon rate, the coupon frequency, the days since the last coupon and the days in the period.

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Bond Accrued Interest

Computes the accrued interest of a fixed-income bond, the slice of coupon that has built up since the last coupon payment up to the settlement date. It uses the linear (actual-days) convention, proportional to elapsed days: interest = face value × (coupon rate ÷ frequency) × (days elapsed ÷ days in period). This is the amount the buyer pays the seller on top of the price, because the whole coupon goes to whoever holds the bond on the payment date. Enter the face value, the annual coupon rate, the number of coupons per year, the days since the last coupon and the days in the period.

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Vasicek Bond Price

Computes the price of a zero-coupon bond with the Vasicek model, the first short-rate interest-rate model with mean reversion. It describes the short rate oscillating around a long-run mean and yields a closed form for the bond price from four parameters: reversion speed, mean, volatility and current rate. Despite allowing negative rates, it's the foundation of the whole family of term-structure models. Enter the parameters and the maturity, and see the price and implied yield.

The results provided by this tool are for general informational and educational purposes only and do not constitute professional, financial, medical, legal, tax or accounting advice. Always confirm important decisions with a qualified professional and official sources.