System Liquidity vs Bank Liquidity: The Same Word Twice

System liquidity is the total of the settlement balances every bank in a banking system holds at the central bank, counted in rupees. Bank liquidity is whether one named bank can meet what it owes on the day it falls due. A bank can improve its own position by taking balances from another bank. Whatever one bank gains, another has lost, so no bank can improve the total.

The two readings differ in kind rather than in size. Bank liquidity is a property of a single balance sheet, and a bank can act on it directly by pledging, selling, borrowing or lending less. System liquidity is a property of a set of accounts. Every move a bank makes has another bank on the far side and the two entries cancel to the rupee, so nothing a bank does reaches the total.

Why does one word carry two different readings?

Read these two sentences one after the other. The banking system is in comfortable surplus. A named bank could not settle on Tuesday afternoon. Most readers put them side by side, feel a contradiction, and quietly decide that one of the two must be wrong. Neither is wrong. The two sentences are claims about two different things that happen to have been given the same name.

Almost every argument about whether there is enough cash around is two people using one word for two things. The word is the same in both mouths, so neither of them notices. One speaker means a quantity that belongs to nobody in particular. The other means a question about one institution on one afternoon. The two meanings are not measured the same way, they are not published by the same route, and they are not even in the same units, so a sentence that uses one to settle an argument about the other has not made an argument at all.

The everyday version does the whole job, so hold on to it. A street of ten shops takes Rs 40,000/- in cash between them on a Tuesday. The Rs 40,000/- is a fact about the street. Whether the tailor at the far end can pay his supplier at four o'clock is a completely different fact. The total does not say which till the money is sitting in, so knowing the street's total settles nothing whatever about the tailor. A question about the street is answered with an amount. A question about the tailor is answered with a yes or a no.

What is one bank's position, and what is it measured against?

Take the single bank first, on its own terms, before anything is compared with anything. One bank's position is its ability to meet what it owes on the day it is owed, out of three things: what it already holds, what it can sell or pledge quickly, and what it can borrow. Set those against the payments that have to leave today, and the answer is a yes or a no.

A bank's position is measured against that bank's own obligations, and nobody else's, and that is what makes the reading its own. A comparison against obligations is not a quantity. The reading has no natural unit. Two sides are held up against each other rather than counted, and the reading moves when either side moves. A bank that has sold nothing and bought nothing can be comfortable in the morning and uncomfortable by three o'clock, purely because a large payment was confirmed for that afternoon.

The household picture is exact here, so use it. A house running on one salary, on the morning a school fee has to be paid, is comfortable if the salary has landed and uncomfortable if it has not. Nothing the house holds has changed between those two states. No furniture was sold, no debt was taken, no wage was cut. Only the timing of one arrival against the timing of one payment changed, and that is the entire reading. Anybody who says the house is short of money is making a statement about a day rather than about a household.

What is the system's position, and what is it measured as?

Now the other side of the word, defined the same way, on its own terms and with nothing borrowed from the paragraphs above. Every bank runs an account with the central bank, and whatever stands in it is that bank's settlement balanceWhat a bank keeps on deposit with the central bank, and the only thing it can actually hand to another bank when a payment falls due. Where these balances sit is worked separately.. Add every one of those accounts together and the total is the system's position. The total is a quantity, a quantity of exactly one thing, and it is measured in rupees.

The system's position is measured against nothing at all, and that is not a gap in the definition but the definition itself. No obligation sits underneath it. Nobody's payments are subtracted from it. The total is a count of balances on one institution's books, and it can be read off without knowing a single thing about what any bank in the system owes to anybody.

Then the half that readers skip, and the whole distinction rests on it. The total says nothing about how those balances are spread across the banks holding them. A total of a given size is consistent with every bank holding roughly what it needs, and it is equally consistent with almost all of it sitting in three accounts while everybody else scrapes. The spread is what decides whether a particular bank can settle this afternoon, and the total does not carry the spread anywhere inside it.

Why can neither figure be used to argue about the other?

The comparison bites here, so slow down for one paragraph. A reading about one bank is produced by holding two sides up against each other and asking whether the first covers the second. A reading about the system is produced by adding up a column of accounts. The first has a base, being that bank's own obligations. The second has no base at all. Nothing is being divided by anything.

The rule worth committing to memory is that the two cannot be added, subtracted or compared, and a sentence using one to argue about the other is using the word twice in a single breath. They look alike in print. Both arrive with confident numbers attached. Both get quoted in the same paragraph of the same article by the same writer. And a reader has almost nothing to warn them. The giveaway is not in the figures but in what each figure was measured against, and that is precisely the part nobody prints.

So name the base every time, in the same sentence as the figure. Say that Suvarna Commercial Bank Limited, an invented bank, brought in an amount equal to 5.00 per cent of its deposits of Rs 1,92,000 crore, rather than that it improved its position by five per cent. Say that a total of balances is a total of balances, rather than that the system has a certain percentage of something. The moment a figure loses its base it becomes usable in an argument it has no business being in, and it is much easier to keep a base attached than to go back and find it later.

What can one bank do about its own position?

Four moves, listed one at a time rather than described in general. Suvarna Commercial Bank Limited is short this afternoon, and it can do any of the following.

Suvarna Commercial Bank Limited can pledge what it holds and take cash against it. A pledgeHanding a security over as security for a loan, so that the lender may keep it if the borrower does not repay. Which securities count, and how much is knocked off a security's value before cash is handed over, belongs to the authority and is not written here. leaves the security on its books and brings a balance in against it. The bank can sell what it holds, turning a security into a balance outright. The bank can also borrow, either from another bank in the overnight marketWhere banks hand each other balances for a single night and take them back the next morning. It is the first place a short bank looks, and it is worked out in its own right elsewhere. or from the central bank under a standing facilityA window a bank can step up to itself, without waiting for the central bank to offer anything. What it costs and what it demands in return belong to the authority and are not written here.. Or it can shrink, by lending less and letting what it has already lent run off as borrowers repay.

The four moves have one thing in common, and it is the whole reason the reading is called that bank's: every one of them is available to that bank alone and is decided by that bank alone. No committee of banks votes on them. Nothing about them requires the rest of the system to agree. A treasury desk can do the first three before lunch and start the fourth the same week. The independence of the four moves is genuine, and it is exactly what makes their effect on the system's total so easy to get wrong.

What can any bank do about the system's total?

Nothing. Not a rupee, not on any afternoon, and not by any of the four moves. Rather than assert that, follow each of the four out of the bank to where it lands.

Pledge to another bank, and that bank hands over a balance: its account falls by what this one's rises by. Borrow overnight, and the same thing happens through a different contract. Sell a security, and the buyer pays for it out of an account at the buyer's own bank. The balance at that bank falls by exactly what this one gains. Lend less, and the balances that would have left this bank simply do not leave. The banks that would have received them do not receive them.

Each of the four is answered by a fall somewhere else, the two entries are identical in size and opposite in sign, and they sum to zero, so all four leave the system's total exactly where it was. The version worth carrying is shorter: one bank's shortfall is another bank's surplus, and a bank that has fixed its own position has moved a problem rather than solved one.

The extreme case is the one that teaches, so push the finding as far as it goes. Suppose every bank in a system spends the entire afternoon doing this, pledging and selling and borrowing from each other in every direction at once. Thousands of entries. Real work, real relief for whoever was short at two o'clock. The total of settlement balances at the close will be identical to the total at the open, to the rupee. Busy is not the same thing as bigger, and no amount of the first will produce the second.

What happens when Suvarna Commercial Bank brings in Rs 9,600 crore?

One movement, followed all the way to both answers. Suvarna Commercial Bank Limited brings in Rs 9,600 crore of settlement balances during the afternoon. The bank could have pledged securities to another bank, sold a security, or borrowed overnight. For the question at hand it genuinely does not matter which.

The bank's position is better by Rs 9,600 crore against the same obligations it woke up with, and the system's total changed by Rs 0 crore. Whatever route the cash arrived by, it came out of an account somewhere else, so one balance rose by Rs 9,600 crore and another fell by Rs 9,600 crore, and the sum is what it was before anybody picked up a phone.

A bare amount is not a reading, so size the movement against a base. Deposits are Rs 1,92,000 crore. Set Rs 9,600 crore against them and it reads 5.00 per cent. Total assets are Rs 2,40,000 crore. Set the same Rs 9,600 crore against them and it reads 4.00 per cent. Both readings are true statements about one amount of cash, and a reader handed either one without its base cannot rebuild the other.

The bank on the other side ends the afternoon Rs 9,600 crore lower than it began, whatever it held before the phone call. A cancelling pair of entries needs only the amount that moved, being Rs 9,600 crore in one direction and Rs 9,600 crore in the other.

The interesting column is the third, so read the table across rather than down. The route decides what happens on this bank's own sheet and it is not the same in every case. A borrowing raises an asset and a liability together, so the sheet gets larger. A sale swaps one asset for another, so the sheet stays the same size and the mix inside it changes. Two lines are unmoved whatever the bank does, being deposits at Rs 1,92,000 crore and net worth at Rs 24,000 crore. And the bottom row is unmoved on every route as well. Four different things can happen to one balance sheet while the same nothing happens to the system, and that is the point.

When does the system's total actually change?

The total changes when cash crosses the edge of the banking system rather than moving about inside it. There are three such crossings worth knowing, and the useful thing about them is not that there are three, but that all three have the same party on the far side.

The first is the central bank itself. When it lends balances to a bank, or takes balances in, the entry sits on its own books, so there is no other bank losing what this one gained. The second is notes. When somebody withdraws cash from a bank and keeps it at home, that money becomes currency in circulationNotes and coin held outside the banking system, in tills, wallets and cash boxes. They are an obligation of the central bank rather than of any bank, which is why they sit outside the total this guide is about.. Currency in circulation is an obligation of the central bank rather than of any bank, and the bank's balance falls with nothing rising to match it. The third is the government. When money is paid out of the government's own account at the central bank into the economy, banks' balances rise against that account, and when tax is paid in, they fall.

All three crossings share the same far side, being the institution that keeps the accounts, and that is what makes the earlier finding exact rather than roughly true. The total of banks' balances changes only through an entry on the central bank's own books. Not mostly. Not usually. Only. The claim is a strong one, and it comes out of double entry rather than out of anybody's policy.

Can a system be in surplus while a bank cannot settle?

Yes, and so can the opposite. The opposite is the part that surprises people. The two readings are independent, so all four combinations occur, and readers assume they cannot because the shared word makes them feel like one thing measured twice.

Take them in turn. A system in surplus with the bank comfortable is the ordinary state and needs no explanation. A system in surplus with the bank short is the case the earlier parts of this sequence were about: the surplus is sitting in accounts at other banks, and a surplus that will not move is of no use whatever to the bank that needs it. A system short with the bank comfortable is a bank holding more than it needs while everybody else scrapes. And short with short is simply both at once.

The two off-diagonal cases are not unusual, they are ordinary, and they are the entire reason the distinction is worth drawing. If the two readings always agreed, one word would be enough and nobody would need to be careful. The two readings do not always agree. A total says nothing about how it is spread, and the spread is what any particular bank actually lives on.

How does a working reader keep the two apart in practice?

Who publishes each of the two measures?

Four things circled below belong to an authority, and each one is drawn as a labelled row with nothing inside it. Every one of them is set by the Reserve Bank of India, every one of them moves, and a written-out value would be wrong rather than merely stale on the morning it changed. The rows stay usable while blank.

The first row and the last row are the two figures this whole guide is about, and they are published by different routes, on different schedules and on different bases. One is a measure of the system's position. The other is what a bank reports about itself, over its own averaging periodA stretch of days over which a bank's position is read as an average rather than day by day. How long that stretch is, and which readings go into it, is set by the authority and is not written here.. A reader who takes either as evidence about the other has made the exact mistake the distinction is drawn to prevent, and the two figures being published separately is a hint, not a coincidence.