Bonds foundations — course checkpoint

You began this course knowing that bonds were "the safe thing." You finish able to price one, read its quote, decode its issuer, and name who is on the other side of the trade. Let's pull the whole structure together before the checkpoint quiz.

Unit 1 — the contract

A bond is a loan chopped into tradeable pieces. You are a lender, not an owner: no vote, no share of profits, no upside beyond the contract — but you sit ahead of shareholders in the queue if things go wrong.

Four terms define it: issuer, face value, coupon, maturity. The coupon is a fixed percentage of face value, never of what you paid. The cash-flow timeline is a comb — small coupons, then one very large principal payment — and because that final payment dominates, everything about a bond's behaviour follows from how the market values one distant sum.

Unit 2 — the price

Bonds are quoted as a percentage of par: 98 means $980 on a $1,000 bond. Above 100 is a premium, below is a discount. The screen shows the clean price; you pay the dirty price — clean plus accrued interest, the seller's earned-but-unpaid share of the next coupon.

The mechanical heart of the course: a bond's price is the present value of its fixed cash flows, discounted at the market's required yield. Our worked case — a 3-year, 5% coupon, $1,000 bond — is worth par at a 5% yield, $947.51 at 7%, and $1,056.57 at 3%. The coupon cannot renegotiate itself, so the price is the only thing free to move. Longer maturities swing harder because distant cash flows are punished hardest by discounting — a $1,000 payment 30 years away is worth $411.99 at 3% and $231.38 at 5%.

And "yield" is three numbers, not one. Coupon rate (contract), current yield (coupon ÷ price), and yield to maturity (the rate that equates price to all remaining cash flows, capturing the pull to par). YTM assumes you hold to maturity, that you are paid in full, and that coupons reinvest at the same rate — three caveats that keep a high yield honest as the price of risk, not a discovery.

Unit 3 — the universe

Everything is priced as government yield + spread. Sovereigns anchor the system through volume, liquidity and standardisation — and borrowing in your own currency is a genuinely different promise from borrowing in someone else's. Corporates add default risk, which brings credit spreads, ratings, the investment-grade boundary, seniority ladders, covenants and callability. Municipals add a tax dimension that makes the same bond worth measurably different amounts to different holders. Agencies and supranationals sit in between.

Bonds are born in auctions and syndicated deals and then trade over the counter, fragmented across dozens of instruments per issuer, most of them barely trading at all.

Unit 4 — the owners

The buyer base is institutional and largely rule-driven: pensions and insurers matching liabilities, banks meeting liquidity and collateral requirements, central banks executing policy, funds and ETFs pooling everyone else. Funding €1 million due in 10 years costs €675,564 at a 4% yield and €558,395 at 6% — which is why pension funds talk about funded status rather than returns, and why some buyers purchase bonds without any view on rates whatsoever.

And so the biggest market in the world stays invisible: no ticker tape, hundreds of instruments per issuer, six-figure minimums, yield-and-spread vocabulary, and holders who never intend to trade.

The three sentences worth keeping

1. The coupon is fixed, so the price must move. Every price-yield fact in fixed income is a consequence of that one constraint.
2. Extra yield is the price of something — default risk, illiquidity, an option you sold, or a tax status you can't use. Find what it is paying for before you call it high.
3. Most bond money is not trying to be clever. It is matching a liability or satisfying a rule, and that shapes prices as much as any opinion does.

Before you sit it

Each of these is a minute at your desk. Any one that is not names the lesson to reopen first.

• Say what par, coupon and maturity each fix, on a bond you invent as you speak — Par, coupon, maturity: what do a bond's terms actually mean?
• Turn a quote of 98 into cash on €1,000 of face — Why is a bond quoted at 98 instead of $980?
• Say what makes a government bond the thing every other bond is priced against — What makes a government bond different from every other bond?
• Say why a pension fund wants a thirty-year bond that you probably do not — Why does a pension fund want a 30-year bond?

Try it now

1. Price a 3-year, $1,000 face, 6% annual coupon bond at an 8% yield, using the discounting method from Unit 2: 60÷1.08 + 60÷1.08² + 1,060÷1.08³ = 55.56 + 51.44 + 841.46 ≈ $948.46. You just did the core calculation of the entire fixed-income world.
2. Below is the newest Treasury curve, fourteen maturities on one date. Write down the shape you see as you read from one month to thirty years: where it rises, where it dips, where it flattens. Those numbers are the anchor every other bond in the currency is priced against.

3. Write five sentences — one per unit theme plus one on what you still can't tell from a bond's terms alone. If sentence five mentions the issuer's ability to pay, you've understood what this course was really about.

Checkpoint quiz next, then the courses that build on this: yields and the curve in depth, duration and credit. Nothing here was a recommendation to hold or avoid anything, and nothing here predicts where rates go — you have learned how the machinery works, which is a skill, not a signal.