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IntermediateOptions, Derivatives & FinancePython

Run this module

cd "Bond Price and Yield"
python "bond_tools.py"

View source on GitHub

Bond Price and Yield Calculator

This utility lets you calculate the fair price of a bond or estimate its yield to maturity (YTM), two of the most basic (and important!) ideas in investing.

What is a Bond?

  • A bond is a type of loan you give to a company or government. In return, they pay you interest ("coupons") regularly, and repay the face value at maturity.
  • Bonds are a huge part of financial markets, used by everyone from governments to big investors.

Key Formulas

  • Bond Price: Present value of all future coupon and face value payments, discounted at the yield to maturity (YTM).
  • Yield to Maturity (YTM): The effective annual return you'd earn if you buy the bond today and hold to maturity.

How to Use

  1. Use bond_price() to find fair value given face, coupon, periods, and YTM.
  2. Use estimate_ytm() to estimate the yield given price, face, coupon, and periods.

Example

from bond_tools import bond_price, estimate_ytm
print('Bond value:', bond_price(1000, 0.05, 10, 0.04))
print('Estimated YTM:', estimate_ytm(1000, 0.05, 10, 1050))

Why It Matters

  • Bonds are a safe and steady part of many portfolios
  • Bankers, exam takers, and investors all need these calculations
  • Helps you understand time value of money and how interest rates affect prices!

Explore more in UTILS and Documentation folders!

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