The Bank Treasurer
Why this chapter
To understand why banks die not from losses but from a shortage of money on one particular Tuesday.
An analogy
Picture a restaurant with an excellent kitchen and a full house. The guests pay by card, the money will arrive in two days, and the meat supplier is standing at the door wanting cash today. The restaurant is profitable — and it can still close, because on Thursday its till is empty. Wealth and having money to hand are different things, and the second one kills faster. The fourth chapter is about the people in a bank who answer for exactly that Thursday: they hold obligations that can be presented today and property that takes months to sell.
How it works
The treasurer watches that the bank has enough reserves for its payments. The tools: the interbank market (a loan from a neighbor), repo (a loan against bonds as collateral — the bond stays on the balance sheet!), a central bank loan.
Interest rate risk: bonds fall in price when rates rise. An AFS portfolio is revalued through equity (the pain is visible), HTM is not revalued (the pain is hidden until you sell). Sell a single HTM security and you have to revalue the whole portfolio. This is the trap that killed SVB.
The treasurer's rule: deposits leave instantly, assets sell slowly. Only liquidity prepared in advance closes the gap.
The words of this chapter
Liquidity
The ability to pay right now without selling anything at a loss. This is not about whether the institution is rich but about whether it has the right money to hand at the right minute.
The concept is needed because customers' money leaves at the speed of a button press, while the loans that have been made lie there for years. The gap between those speeds is the treasury's job.
The interbank market
A short loan of reserves between banks, usually overnight. Whoever has a surplus today lends to whoever has a shortfall today.
It was invented out of simple arithmetic: payments land on banks unevenly, and holding a stock against the worst day is too expensive for each of them separately.
Repo
A loan against securities as collateral, documented as a sale with an obligation to buy back. Legally a sale, economically a loan.
It was invented to lend to someone you do not trust on their word: if they do not repay, you keep the security. That is why such money is cheaper than unsecured money.
AFS and HTM
Two accounting shelves for one and the same bonds. On the first, securities are revalued at market prices and a fall in value is visible at once. On the second, “to maturity,” intermediate prices are not shown at all.
The second shelf was invented honestly: if a security really is held to the end of its term, market swings do not matter. The problem is that the same shelf makes it possible not to notice a loss.
Interest rate risk
A bond's tendency to get cheaper when rates in the economy rise. Bought at a low rate, its price falls when rates are high, because new bonds pay more.
This is not an anomaly but arithmetic: the price adjusts so that the yield to maturity matches the market.
The central bank window
The possibility of borrowing from the central bank against collateral. When it lends to a bank, it creates reserves out of nothing — with the same stroke of a pen with which a bank creates balances for its customers.
It was invented as a last line: if everyone wants money at once, there is nowhere else to get it. The private market shuts in a panic; the central bank does not.
What happens to the balance sheet
The whole chapter fits into one picture: on the left, property sorted by how fast it can be sold; on the right, obligations sorted by how fast they can leave. At the top of both is what moves in minutes, at the bottom what moves in years. The treasurer's problem is that the top of the right-hand column is always bigger than the top of the left. The gap can be closed in four ways, and they differ in price and speed: borrow from a neighbor, pledge securities, sell securities at a loss, or go to the central bank. The order is usually exactly that, and every next step is more expensive than the one before.
Where the money comes from here
A treasury earns almost nothing — it buys time. Its income is the difference between what the bank pays for short money and what it receives on long investments. The one who earns on this market is whoever has a surplus today: they lend it overnight and get interest with almost no risk. The one who loses is whoever comes for money on a bad day: the price of urgency rises fast, and in a panic people sell at any price and haggle afterwards. Here is why this matters to you: the same arithmetic governs your business. A profitable company goes bust not from a loss but from a cash gap, and the only protection is liquidity stored up in advance, back when it was cheap.
What people usually get wrong
The common belief. If a bank has plenty of property and is profitable, nothing threatens it.
What is actually true. A hidden markdown on bonds stays a markdown. In 2022 US banks' unrealized losses on their securities holdings reached 620 billion dollars, and at one of them a hole like that was comparable to the owners' entire cushion.
The common belief. The bank fell because it had too little property.
What is actually true. SVB received withdrawal requests of roughly 42 billion dollars in a single day — about a quarter of all its customer balances. Slow property cannot be sold within a day at any price.
The common belief. The central bank rescues any sinking bank, so none of this is frightening.
What is actually true. It cures a shortage of money, not a hole in the cushion. A program that lent against the face value of bonds that had fallen in price put out the acute panic within days — but it did not help those who had almost none of the eligible bonds.
After this chapter you will be able to
- tell a solvency problem apart from a liquidity problem, and see which of them kills faster
- see how collateral changes the price of money and the lender's place in the queue on a default
- tell an economic loss apart from a recognized one, and see the moment at which the difference between them disappears
- identify the moment at which an institution is already insolvent, although nothing has happened yet in its books
- line up the sources of liquidity by speed and price, and pay for urgency knowingly
Check yourself
The bank borrowed money against government bonds as collateral. Have those bonds left its property?
No.
Legally it is a sale with an obligation to buy back, economically a secured loan. The securities stay on the balance sheet but stop being a free stock: what has been pledged cannot be pledged a second time.
Why is a security on the “to maturity” shelf dangerous precisely as a store for a rainy day?
Because it cannot be sold without opening up the loss on the whole portfolio.
Selling even one such security cancels the right to account for the whole portfolio that way, and all the hidden markdown comes out at once. Property that cannot be touched without consequences is not a store.
A bank has a profit and a sufficient owners' cushion, but tomorrow it has nothing to pay with. What kind of problem is this?
A liquidity problem.
Wealth and having money to hand are different things. This is exactly the diagnosis the central bank treats, and it treats it fast. A hole in the owners' cushion it does not treat at all.
In short
A bank's customers can take their money out in a second, while the loans it has made come back over years. That difference in speed is the main danger in its work. It can be closed in four ways: borrow from another bank, pledge bonds, sell them at a loss, or go to the central bank. Every next way is more expensive than the last, and in a panic everything gets more expensive at once. That is why banks die not from losses but from not having enough money for their payments on the day it matters.
Reading is half the job. In the academy this chapter is worked through by posting entries: you run the operations yourself and see whether the balance sheet still balances.