Introduction to Bonds

Learn what bonds are, how they work, and why they are considered safer investments than stocks.

Intermediate25 minLesson
Printable worksheet

Definition

A bond is a type of loan that you give to a company or government. When you buy a bond, you are lending money to the issuer, and they promise to:
  1. 1.Pay you interest (called the coupon) regularly
  2. 2.Return your original money (called the face value or principal) at the end
Key Bond Terms:
  • Face Value (Par Value): The amount you will receive when the bond matures (typically 1000 dollars)
  • Coupon Rate: The annual interest rate paid on the bond
  • Maturity Date: When the bond expires and you get your face value back
  • Coupon Payment: The actual interest payment you receive
Annual Coupon Payment=Face Value×Coupon Rate\text{Annual Coupon Payment} = \text{Face Value} \times \text{Coupon Rate}
Example: A bond with 1000 dollars face value and a 5% coupon rate pays:
1000×0.05=50 dollars per year1000 \times 0.05 = 50 \text{ dollars per year}

Try it now

What do you receive regularly when you own a bond?

Worked Examples

You buy a bond with a face value of 1000 dollars and a coupon rate of 6%. How much interest will you receive each year?
1

Identify the values

Face Value = 1000 dollars, Coupon Rate = 6% = 0.06 → Values identified
2

Apply the formula

Annual Interest = Face Value ×\times Coupon Rate → 1000×0.061000 \times 0.06
3

Calculate

1000×0.06=601000 \times 0.06 = 60 → 60 dollars per year

Common Mistakes

Confusing coupon rate with total return

Why it's wrong: A 5% coupon rate means 5% of the face value per year, not 5% of your total investment return.

Correct: The coupon rate tells you the annual interest payment as a percentage of face value. Total return also depends on how long you hold the bond.

Forgetting that face value is returned at maturity

Why it's wrong: Students sometimes think the interest payments are all they get, forgetting they also get their principal back.

Correct: At maturity, you receive both your final interest payment AND the full face value. Your total return = all coupon payments + face value.

Using the wrong decimal for percentage

Why it's wrong: Writing 5% as 5 instead of 0.05 in calculations leads to answers that are 100 times too large.

Correct: Always convert percentages to decimals: 5% = 5/100 = 0.05

Interactive Visual

Bar Chart

Total interest over the bond's life

Bond A: 1000 at 5%, 8 years(400)
Bond B: 2000 at 3%, 10 years(600)

Interactive Sandbox

Expression Calculator

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History

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Practice Problems

15 problems
Problem 1 of 15
Easy
What do you receive regularly when you own a bond?

Why It Matters

Bonds are essential for building a balanced investment portfolio:
  • Predictable Income: Unlike stocks, bonds pay regular, fixed interest payments
  • Lower Risk: Bonds are generally safer than stocks because you are guaranteed your principal back (unless the issuer defaults)
  • Diversification: Bonds often move opposite to stocks, providing stability during market downturns
  • Real-World Uses:
  • Governments issue bonds to fund roads, schools, and infrastructure
  • Companies issue bonds to expand their businesses
  • Retirees often invest in bonds for steady income
Understanding bonds helps you make smarter decisions about saving and investing for your future!

Real World Applications

Government Savings Bonds

Many governments issue savings bonds that citizens can buy to help fund public projects while earning interest.

Example:

A 10-year government bond with 1000 dollars face value at 3% pays 30 dollars per year, totaling 300 dollars in interest over 10 years.

1Try It Yourself

Your grandparent gives you a 500 dollar savings bond with a 4% coupon rate that matures in 5 years.

How much total interest will you earn by maturity?

Step 1: Write the mathematical expression

Calculate: Face Value ×\times Rate ×\times Years

Corporate Bonds for Expansion

Companies issue bonds to raise money for expansion, new equipment, or other business needs.

Example:

A tech company issues a 5-year bond at 6% to fund a new factory. Investors receive 60 dollars annually per 1000 dollar bond.

2Try It Yourself

A company offers a 2000 dollar bond with 5% interest for 7 years.

What is the total amount you will receive at the end (interest + face value)?

Step 1: Write the mathematical expression

Total = Face Value + (Annual Interest ×\times Years)

Key Takeaways

  • 1A bond is a loan you give to a company or government in exchange for regular interest payments
  • 2Face value (par value) is the amount returned to you when the bond matures
  • 3Coupon rate is the annual interest rate, and coupon payment is the actual interest received
  • 4Annual Interest = Face Value times Coupon Rate
  • 5Total Interest = Annual Interest times Number of Years
  • 6Bonds are generally safer than stocks but offer lower potential returns

Frequently Asked Questions

This is called a default. If a company defaults, bondholders may lose some or all of their investment. This is why bonds from stable governments (like US Treasury bonds) are considered the safest.
This is called a default. If a company defaults, bondholders may lose some or all of their investment. This is why bonds from stable governments (like US Treasury bonds) are considered the safest.
Neither is universally better - they serve different purposes. Bonds provide stable, predictable income with lower risk. Stocks have higher potential returns but more volatility. Most financial advisors recommend having both.
Both pay interest, but bonds lock your money for a fixed term (you cannot withdraw early without potentially losing money), while savings accounts let you access your money anytime. Bonds typically pay higher interest rates in return for this commitment.

Glossary

Bond
A loan to a company or government that pays interest and returns the principal at maturity
Face Value (Par Value)
The amount the bondholder receives when the bond matures, typically 1000 dollars
Coupon Rate
The annual interest rate paid on a bond, expressed as a percentage of face value
Coupon Payment
The actual interest payment received, calculated as Face Value times Coupon Rate
Maturity Date
The date when the bond expires and the face value is returned to the bondholder
Principal
The original amount invested in the bond (same as face value)
Yield
The overall return on a bond, taking into account the price paid and interest received
Today's challengeOne problem, three tries

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