Bond Equivalent Yield (BEY) Calculator

Tool Introduction

The "Bond Equivalent Yield (BEY) Calculator" is an online tool designed for investors, helping you quickly calculate the Bond Equivalent Yield (BEY) for short-term discount bonds. BEY annualizes the yield of short-term, discount-issued bonds (such as Treasury bills) to make them comparable with the annualized yield of interest-bearing bonds, serving as an important indicator for measuring short-term bond investment returns. This tool accurately calculates BEY based on the bond's face value, purchase price, and days to maturity, and allows you to customize the number of decimal places for the result, helping you evaluate investments more scientifically.

How to Use

1. In the "Bond Face Value" input box, enter the par value of the bond at maturity, for example: 1000 yuan.
2. In the "Purchase Price" input box, enter the price you paid when purchasing the bond, for example: 950 yuan.
3. In the "Days to Maturity" input box, enter the number of days between the purchase date and the bond's maturity date, for example: 180 days.
4. In the "Decimal Places" input box, set the number of decimal places you want the calculation result to retain, with a default of 2 places.
5. Click the "Calculate" button to immediately get the calculated Bond Equivalent Yield (BEY).

Input Parameter Description:

• Bond Face Value (faceValue): The par value of the bond, the amount receivable at maturity, in "yuan", must be a positive number.
• Purchase Price (purchasePrice): The actual amount paid when purchasing the bond, in "yuan", must be a positive number, and usually less than or equal to the face value.
• Days to Maturity (daysToMaturity): The remaining number of days from purchase to the bond's maturity, in "days", must be a positive integer.
• Decimal Places (precision): The number of digits after the decimal point for the result display, in "places", must be a non-negative integer.

Output Result Format:

The tool will directly output the calculated Bond Equivalent Yield (BEY) percentage value, rounded to the number of decimal places you set.

Frequently Asked Questions

• Q: What is Bond Equivalent Yield (BEY) and what is its purpose?
• A: BEY stands for Bond Equivalent Yield. It is an indicator that annualizes the yield of short-term, discount-issued bonds (such as Treasury bills), making it easier for investors to fairly compare the yield of such zero-coupon bonds with the annualized yield of interest-bearing bonds. It assumes a year has 365 days and uses simple interest calculation.
• Q: What input formats are supported?
• A: All input parameters support pure numeric format. Bond face value, purchase price, and days to maturity must be positive numbers, and decimal places must be non-negative integers.
• Q: What is the format of the output result?
• A: The output result is a percentage value, which is the calculated Bond Equivalent Yield (BEY), accurate to the specified number of decimal places.
• Q: What happens to BEY if the purchase price is higher than the face value?
• A: If the purchase price is higher than the face value, it means the bond was purchased at a premium, in which case the investment return is negative, and the BEY will also show a negative value, indicating a loss.

Notes

• Please ensure that the entered bond face value, purchase price, and days to maturity are accurate numbers and consistent with actual conditions.
• The purchase price should generally be lower than the bond's face value to obtain a positive return; if the purchase price is higher than the face value, the calculation result will be a negative yield.
• Days to maturity must be a positive integer, not negative or zero.
• This tool uses 365 days as a year for calculation, which is a common practice in financial markets, but different calculation methods (such as 360 days) will slightly affect the result.
• The calculated BEY is a theoretical value, and actual investment decisions also need to consider various factors such as market risk, liquidity, and taxes.