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Bond Yield to Maturity Calculator
x402
Bond Yield to Maturity Calculator is a paid API for AI agents from agent402.tools, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-15).
Computes the yield to maturity (YTM) of a bond given its market price, coupon rate, face value, and time to maturity using bracketed bisection root-finding.
Price / call$0.002
Success—
StatusUnknown
How this service works
Solve a bond's yield to maturity from its market price - the annual rate that present-values the coupons plus face to that price. Bracketed bisection root-find.
Output
Returns the yield to maturity as an annual rate (decimal or percentage) — the internal rate of return that equates the present value of all future coupon payments and face value repayment to the given market price.
Example use cases
Example prompt
“What's the yield to maturity on a bond with a face value of $1000, a 6% annual coupon paid semiannually, 10 years to maturity, currently trading at $950?”
Technical details
Endpoint
POSThttps://agent402.tools/api/bond-ytmWhen to prefer
Use this endpoint when you need to solve for a bond's implied yield to maturity from its observed market price — particularly when you want a numerically robust root-finding approach (bisection) rather than an approximation formula. Ideal for fixed-income analysis, portfolio evaluation, or comparing bonds on a yield basis.
Side effects
- Missing required fields (price, years, faceValue, couponRate) returns a 400-level error
- Non-convergence if price is outside plausible bounds for the bisection bracket
- Negative or zero years/faceValue causing arithmetic errors
- Invalid couponRate (e.g. >1 treated as a percentage rather than decimal) may produce unrealistic YTM
- periodsPerYear of 0 causes division error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| price | number | Current market (clean) price |
| years | number | Years to maturity |
| faceValue | number | Par/face value |
| couponRate | number | Annual coupon rate as decimal |
| periodsPerYear | number | Coupon periods per year. Default 2. |
Output
Schema · Response
{
"type": "json",
"example": {
"periods": 20,
"converged": true,
"yieldToMaturity": 0.06
}
}Tags
x402
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