Product Fundamentals: Bonds, Repos and Derivatives Explained Simply
Chapter 1 is the foundation. It covers all the products you need to know before the book gets into the actual trading strategies. If you already know bonds, repos, swaps, and options, you can skim. But honestly, a quick review never hurts.
Bonds: The Building Block
A bond is basically an IOU. Someone borrows money and promises to pay interest along the way and return the principal at the end. The borrower is usually a government or a corporation. (Fun fact from the book: David Bowie once issued bonds. Yes, that David Bowie.)
Fixed-rate bonds pay a set coupon. The word “coupon” comes from the old days when bonds were physical pieces of paper and you would literally tear off a coupon to collect your interest. The key thing to understand is that bonds trade on price, quoted as a percentage of face value. If a bond has a 5% coupon but the market rate for similar investments is higher, the bond trades below 100 (below par). If the coupon is more attractive than what is available elsewhere, it trades above 100.
The concept of yield captures both the coupon and any capital gain or loss if you hold the bond to maturity. This is how investors actually compare bonds.
Floating-rate notes (FRNs) are different. Instead of a fixed coupon, they pay a variable rate. Typically something like LIBOR plus a spread. Banks issue a lot of FRNs because their assets (like mortgages) also pay floating rates. Matching floating liabilities to floating assets just makes sense.
Inflation: Real vs. Nominal
This section is one of those topics where everyone thinks they understand it until they try to explain it.
Inflation means prices are rising. Deflation means prices are falling. Disinflation means prices are still rising but at a slower pace.
Here is the practical bit. If you buy a bond paying 5% but inflation is 3%, your real return is roughly 2%. The Fisher equation formalizes this: the nominal yield on a bond equals the real yield plus expected inflation (plus a small premium that most people ignore).
Breakeven inflation is the difference between nominal bond yields and real yields on inflation-linked bonds. If a 5-year government bond yields 4.5% and the equivalent inflation-linked bond yields 1.5%, the breakeven inflation rate is 3%. If you think inflation will average more than 3%, buy the inflation-linked bond. Less than 3%? Stick with the nominal bond.
Inflation-linked bonds (like TIPS in the US, or RPI-linked gilts in the UK) adjust their value based on a price index. They protect your purchasing power. The book explains that different countries use different indices. The US uses CPI, the UK uses RPI, and Europe uses HICP.
Repos: How Bonds Get Financed
Banks do not have piles of cash sitting around. When they buy a bond, they need to borrow the money to pay for it. That is where repos come in.
A repurchase agreement (repo) is basically a collateralized loan dressed up as two trades. You sell a bond today with an agreement to buy it back later at the same price plus interest. The interest you pay is called the repo rate, and it is usually about an eighth of a percent below LIBOR because the loan is secured.
The legal title of the bond transfers to the buyer, but the economic risk stays with the seller. If the bond pays a coupon during the repo period, it gets passed back to the seller.
Here is where it gets interesting. If you think a bond will go up, you buy it and repo it out to finance the purchase. If you think it will go down, you reverse repo it in (borrow the bond), sell it, and buy it back cheaper later. Classic long and short positions, just using the repo mechanism.
Sometimes a specific bond becomes so popular (or so heavily shorted) that it goes “on special.” Everyone wants it, so the repo rate for that bond drops. It can even go negative, meaning you are effectively paying someone to lend you cash just so you can get your hands on that bond.
Credit Fundamentals
When you buy a bond from a company instead of a government, you are taking credit risk. The risk that they cannot pay you back.
Rating agencies like S&P, Moody’s, and Fitch assess this risk. The scale goes from AAA (very safe) down to D (already defaulting). Anything rated BBB- or above is “investment grade.” Below that is “high yield,” which is a polite way of saying the company is riskier and has to pay you more to borrow.
The extra return you earn for taking credit risk is called the credit spread. It is the yield above the “risk-free” government rate. The worse the credit, the wider the spread.
Derivatives: Futures, Forwards, Swaps, and Options
A derivative gets its value from something else. The four building blocks are futures, forwards, swaps, and options. Almost everything in derivatives is built from these.
Futures and Forwards
A future is an exchange-traded contract that locks in a price today for delivery later. They come in standard sizes, have set expiry dates, and require margin (collateral). A central clearing house sits between buyer and seller, which removes counterparty risk.
A forward does the same thing but trades over the counter (OTC). You get more flexibility on size and dates, but you are exposed to the credit risk of whoever is on the other side.
Forward rate agreements (FRAs) are a specific type of forward that lock in an interest rate for a future period. A “3s6s” FRA fixes the 3-month rate starting 3 months from now. Traders use them to bet on where short-term rates are heading. There is a quirk with FRAs: they settle at the start of the period (not the end), so the payment gets present-valued.
Interest Rate Swaps
An interest rate swap is a deal where one party pays a fixed rate and receives a floating rate (or vice versa). No principal changes hands. You just exchange interest payments on a notional amount.
The book tells a great story about how even experienced traders cannot agree on what “long” and “short” mean in swaps. The lesson? Just say “pay fixed” or “receive fixed” and avoid expensive miscommunication.
Asset swaps combine a fixed-rate bond with a pay-fixed swap. The fixed flows cancel out and you are left with LIBOR plus a spread. You have turned a fixed-rate bond into a synthetic floating-rate note. Useful when you want credit exposure without interest rate risk.
Credit Default Swaps (CDS)
A CDS is insurance on a company’s debt. You pay a quarterly premium to a protection seller. If the company defaults, the seller compensates you. If nothing happens, the seller keeps your premiums.
The buyer of protection is “short” the credit. The seller is “long.” In the US, CDS trade with fixed coupons of 100 or 500 basis points, with an upfront cash adjustment to reflect the actual market spread.
Credit events that trigger a payout include bankruptcy, failure to pay, and restructuring. The market moved from physical settlement to auction-based cash settlement because total CDS notional outstanding grew way larger than the actual bonds in existence.
Options
An option gives you the right but not the obligation to buy (call) or sell (put) at a set price. You pay a premium for this right. European options can only be exercised at expiry. American options can be exercised any time. Bermudan options split the difference with a schedule of exercise dates.
In interest rates, the main option types are caps/floors and swaptions. A cap protects a borrower against rates rising above a certain level. A floor protects a lender against rates falling too low. A swaption gives you the right to enter an interest rate swap at a fixed rate.
The book also covers exotic options. Barrier options have triggers that activate or kill the option at certain price levels. Binary options pay a fixed amount if in the money. Both are cheaper than vanilla options because of the conditions attached.
My Take
Chapter 1 is dense but practical. The repo section is something many students gloss over, and that is a mistake. Understanding how positions get financed is half the battle in fixed income.
The key takeaway: all of these products are connected. Bonds, repos, swaps, futures, options. They are different ways of expressing similar economic views. That is the whole point of the relative value framework this book builds on.
If you felt overwhelmed, that is normal. We will revisit all of these instruments in more detail as the series continues. Chapter 2 is where the pricing relationships start clicking into place.
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