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Published February 15, 2026

Simple Guide to Bond and Fixed Income Terms: introduction

Learn bond basics with our 2026 Fixed Income Glossary. Simple definitions for yield, coupons, and types of bonds. Perfect for beginners!

Simple Guide to Bond and Fixed Income Terms: introduction
Stashfin

Stashfin

Feb 15, 2026

Simple Guide to Bond and Fixed Income Terms

Investing in bonds is like being the bank. You lend money to a company or a government, they promise to pay you back, and they pay you extra money for the favor. This extra money is called interest. Here is the easy way to learn the lingo.

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What is Fixed Income?

Fixed income is a specific way to invest that differs from stocks. When you buy a stock, you own a tiny piece of a company. When you buy fixed income, you are a lender.

The "fixed" part means the pay is steady. You know how much money you will get and when you will get it. It acts like a set schedule for your money to grow, helping your portfolio stay calm when the stock market gets wild.


Essential Bond Terms (The "Must-Knows")

Bond Principal / Face Value

The Principal is the amount of money you lend at the start. It is also called Face Value.

  • Most bonds have a face value of $1,000.
  • At the "Maturity Date," you get this full amount back.

Coupon Rate

The Coupon Rate is the interest rate.

  • If a $1,000 bond has a 5% coupon, you receive $50 every year.
  • Historically, investors clipped physical paper coupons to get their cash; today, it is all digital.

Maturity Date

The Maturity Date is the finish line—the day the loan ends.

  • Short-term: Ends in 1 year.
  • Long-term: Can last 30 years.
  • On this day, the borrower returns your full Principal.

Bond Issuer

The Issuer is the entity borrowing your money. This could be:

  • The Government (Treasuries)
  • Corporations (Apple, Walmart, etc.)
  • Municipalities (Cities building parks or schools)

Understanding Yield and Price

Current Yield vs. Yield to Maturity (YTM)

Yield is the word for "how much you actually make."

  • Current Yield: Looks at the interest you get today compared to the price you paid.
  • Yield to Maturity (YTM): The "total score." It counts all interest until the end, plus any gains or losses if you bought the bond at a discount or premium.

The Inverse Relationship

This is the most important rule in bonds. When interest rates go up, bond prices go down. Think of it like a Seesaw:

  • If new bonds pay 7%, your old 5% bond looks boring. You must lower your price to sell it.
  • If rates drop to 2%, your 5% bond becomes a "superstar," and its price goes up.

Types of Bonds

Type Issuer Risk Level Key Feature
Treasuries U.S. Government Lowest Safest in the world; lower interest.
Corporate Private Companies Medium to High Higher interest to reward the extra risk.
Municipal Cities/States Low to Medium Often tax-free interest payments.

Risks and Ratings

Default Risk

Default occurs when a borrower cannot pay you back. This is why investors check Credit Ratings before buying:

  • AAA: The "A+" grade. Extremely safe.
  • BBB: The "C" grade. Average safety.
  • Junk Bonds: High risk, but they pay high interest to attract lenders.

Duration (Interest Rate Risk)

Duration measures how sensitive a bond is to interest rate changes.

  • High Duration: Prices jump or fall significantly when rates move (common in long-term bonds).
  • Low Duration: Prices stay mostly the same (common in short-term bonds).

Advanced Concepts: Par, Premium, and Discount

Bonds do not always sell for exactly $1,000 on the open market:

  • Par Value: Selling for exactly face value ($1,000).
  • Premium: Selling for more than face value (e.g., $1,050) because the interest rate is very attractive.
  • Discount: Selling for less than face value (e.g., $950). You still get $1,000 back at maturity!

Inflation Risk: If your bond pays 3% but inflation is 5%, you are losing "buying power." Your money is growing slower than the cost of living.

Call Provision: Some bonds are "Callable," meaning the borrower can pay you back early. They usually do this if interest rates drop, similar to a homeowner refinancing a mortgage.

Frequently asked questions

Common questions about this topic.

Yes, usually. If a company goes broke, they must pay the people they owe money to (bondholders) before they pay the owners (stockholders). Bonds also have a set plan for payments, while stocks do not.

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