Macro desk · RBI money market operations, net liquidity injected (outstanding including today) · day to 16 Sep 2026
Spare bank cash held by RBI fell Rs 247,725 crore in one day, its largest move, yet overnight rates barely stirred
The RBI held Rs 737,513 crore of banks' spare cash on 16 Sept, down from Rs 985,238 crore the day before.
Banks' spare cash, which shapes how hard they bid for fixed deposits, thinned sharply in one day but is still large, and overnight rates did not react. Savers and deposit platforms would feel it only if the thinning lasts long enough to lift those rates.
Published daily. The page it is printed on at rbi.org.in.
The spare cash RBI was holding for banks shrank by Rs 247,725 crore in one day, about 17.3 times a typical day's move and the largest the series has taken. Our guess: much of it is banks taking money out of RBI's overnight parking window, because the amount parked there fell by Rs 142,930 crore the same day, more than half the move; the rivals are money leaving the banking system, banks putting it to work in their own lending and payments, or RBI's auctions to soak up cash maturing, and RBI's own account of that day's operations would settle which.
Why we think so3 reasons
On what grounds?
- The first reason is the parking window. The money banks left overnight with RBI fell by Rs 142,930 crore on the same day, which is more than half the fall in the surplus RBI was holding. When banks park less, RBI is holding less of their cash, so this is the most direct link the figures offer. The chart below sets the two side by side. But one figure counts only that day's deposits and the other counts everything outstanding, so the match is suggestive rather than exact.
- The second reason explains why this is still a guess and not an answer. The rest of the move is not explained by the parking window, and the related daily readings cannot tell apart the possible reasons: money leaving the banking system for somewhere else, banks using it in their own business, or RBI's auctions to soak up cash maturing or not being rolled over. RBI's own result for that day's auctions, and its account of the day's operations, would separate them. Until then the cause stays open.
- The third reason is about how much it matters. Even after the fall, RBI was still holding Rs 737,513 crore of banks' spare cash, so banks as a whole remained in surplus. The overnight rates barely reacted: the call money rate slipped to 5.02 percent and the triparty repo rate rose to 4.87 percent. A system truly running short of cash would show higher overnight rates and heavier use of the emergency window, which fell to Rs 308 crore.
What would prove us wrong3 trip-wires
What would we have to see to drop that read?
- First, if RBI's own note on the day's operations names a different cause, such as its auctions to soak up cash maturing, the guess about the parking window is wrong.
- Second, if the surplus bounces straight back to its earlier level in the next few days, this was a passing swing and not a shift in banks' spare cash.
- Third, if the same weeks last year show a similar mid-month fall, this is a regular seasonal pattern rather than news.
RBI money market operations, net liquidity injected (outstanding including today), day by day
Is this day's move out of line with the days before it?
Bigger than 64 of the 82 earlier daily changes we hold (78.0% of them), by percentage change. Of the 82 other daily changes in this series since 23 Jun 2026, 18 were larger than this one by percentage change (Rs 247,725 crore, 25.1%, either way). Counted from the published readings themselves; the tally is ours.
What to watch3 things to watch
What happens next, and when would we know?
- The amount banks park in RBI's overnight window: if it keeps falling below Rs 135,853 crore over the next few days, the spare cash really is thinning.
- The call money rate: our guess is that a climb from 5.02 percent to above the three-month bill yield of 5.28 percent would mean banks are running short.
- For a fixed-deposit platform such as StableMoney, the rates banks list: only once both of those readings turn are higher deposit rates likely to follow.
Who this touches
What does each group do differently, and on what condition?
Opinion · adds no figures the Facts do not hold · every effect is potential and states its condition
| Who | What they do differently | On what condition |
|---|---|---|
| Banks | Banks with less spare cash parked at RBI have less cushion, which can push them to compete harder for deposits, at a higher cost to them. | ◆ if the shrinking surplus continues, banks have less idle cash and may need to raise deposits; if it reverses, nothing changes. RBI's figures over the next days would settle it.unclear |
| Savers & depositors | Banks short of spare cash tend to offer higher rates on fixed deposits to attract money, which is what a saver on a platform such as StableMoney would see. | ▲ if banks' spare cash keeps shrinking over weeks, not just one daypotential benefit |
| Wealth managers & private banks | A fixed-deposit platform like StableMoney shows its users the rates banks offer; better rates make its listings more attractive and can bring in more savers. | ▲ if tighter bank cash leads banks to raise fixed-deposit ratespotential benefit |
| Borrowers | Banks paying more for money eventually pass it on in what they charge borrowers. | ▼ if the shrinking surplus lasts long enough to lift overnight and short-term ratespotential risk |
Go deeper
Learn: RBI money market operations, net liquidity injected (outstanding including today), in plain English
What this figure is. Every working day the Reserve Bank of India prints how much money it has, in total, put into or taken out of the banking system through its money market operations, counting everything still outstanding including that day's deals. It is called net liquidity injected. It is for anyone who needs to know whether banks are flush with spare cash or short of it: bank treasurers setting deposit and lending rates, money market funds, and savers and platforms watching where fixed-deposit rates may go next.
The other words behind these figures
What the minus sign means. A negative figure means RBI is taking money in rather than putting it out: banks have more cash than they need and are parking the surplus with the central bank. So minus Rs 985,238 crore on 15 September means RBI was holding that much of banks' spare cash, and minus Rs 737,513 crore on 16 September means it was holding less. The surplus shrank by Rs 247,725 crore in one day, but banks as a whole still had a large surplus left.
How unusual the day was. Across the 82 earlier daily changes in this series this year, the middle-sized move, either way, was Rs 14,315 crore. This one was about 17.3 times that, and the largest move the series has taken. Only 3 of those 82 earlier days moved by at least half as much, Rs 123,862 crore.
The overnight parking window. The Standing Deposit Facility is the window where banks can leave spare cash with RBI overnight at a fixed rate, with no auction and no collateral. The amount banks left there fell from Rs 278,783 crore on 15 September to Rs 135,853 crore on 16 September, down Rs 142,930 crore. This counts only that day's deposits, whereas the net liquidity figure counts everything outstanding, so the two are read side by side but are not the same measure.
The emergency borrowing window. The Marginal Standing Facility is the opposite window: where a bank short of cash can borrow overnight from RBI at a penalty rate. Use of it fell by Rs 730 crore to Rs 308 crore, a small amount, so banks were not scrambling for cash that day.
The overnight rates. The call money rate is the average rate banks charge each other for unsecured overnight loans; it slipped 0.04 percentage points to 5.02 percent. The triparty repo rate is the average rate on overnight loans backed by government bonds, arranged through a third party; it rose 0.02 percentage points to 4.87 percent. Both barely moved.
The three-month Treasury bill yield. A Treasury bill is short-term government borrowing. The benchmark yield on a three-month bill, published daily by FBIL and used to value these bills each day rather than the rate at a government auction, rose 0.03 percentage points to 5.28 percent.
How the related readings compare. Two of the daily readings set beside this one moved sharply the same day: the net liquidity figure itself and the overnight parking window, which fell by Rs 142,930 crore. The rest barely moved: the emergency window changed by a small amount, and the call money rate, the triparty repo rate and the three-month bill yield each moved by a few hundredths of a point.
The figures, their edition, and where they came from
| Figure | Reading | Date | Where from |
|---|---|---|---|
| RBI money market operations, net liquidity injected (outstanding including today) | −Rs 737,513 crore | 16 Sep 2026 | rbi.org.in · unusual for this series |
| RBI money market operations, net liquidity injected (outstanding including today) (previous reading) | −Rs 985,238 crore | 15 Sep 2026 | rbi.org.in |
| RBI money market operations, Standing Deposit Facility (SDF) amount | Rs 135,853 crore | 16 Sep 2026 | rbi.org.in |
| RBI money market operations, Marginal Standing Facility (MSF) amount | Rs 308 crore | 16 Sep 2026 | rbi.org.in |
| RBI money market operations, call money weighted average rate | 5.02 percent | 16 Sep 2026 | rbi.org.in |
| RBI money market operations, overnight triparty repo weighted average rate | 4.87 percent | 16 Sep 2026 | rbi.org.in |
| 3-month Treasury bill benchmark yield, FBIL daily | 5.28 percent | 16 Sep 2026 | fbil.org.in |
| Change in RBI money market operations, net liquidity injected (outstanding including today) | Rs 247,725 crore | Our calculation, not printed by any publisher |
How sure we are of each read, and why not more
| Who | Effect | How sure |
|---|---|---|
| Banks | unclear | Inferred · a single day |
| Savers & depositors | potential benefit | Inferred · rates did not move on the day |
| Wealth managers & private banks | potential benefit | Inferred · one day, no rate change yet |
| Borrowers | potential risk | Inferred · overnight rates barely moved |
Whether we have said this before
Of 82 earlier steps of this series in 2026, 3 moved by at least half as much in its own unit (Rs 123,862 crore).
Audit trail: why this card is held, and the store's own notes
Status: Published — gaps noted. held: 1 needs data
- Needs data (1)
- peer group incomplete: 3 of 10 other series from Reserve Bank of India in Rs crore have the same figure for the same period
Computed by us, from the published figures:
- Change in RBI money market operations, net liquidity injected (outstanding including today): Rs 247,725 crore, from the 2026-09-16 reading minus the 2026-09-15 reading
Exact figures: RBI money market operations, net liquidity injected (outstanding including today) −Rs 737,513 crore, +Rs 247,725 crore against 2026-09-15; RBI money market operations, net liquidity injected (outstanding including today) (previous reading) −Rs 985,238 crore; RBI money market operations, Standing Deposit Facility (SDF) amount Rs 135,853 crore, −Rs 142,930 crore against 2026-09-15; RBI money market operations, Marginal Standing Facility (MSF) amount Rs 308 crore, −Rs 730 crore against 2026-09-15; RBI money market operations, call money weighted average rate 5.02 percent, −0.04 percentage points against 2026-09-15; RBI money market operations, overnight triparty repo weighted average rate 4.87 percent, +0.02 percentage points against 2026-09-15; 3-month Treasury bill benchmark yield, FBIL daily 5.28 percent, +0.03 percentage points against 2026-09-15.
What the source itself warns about
- RBI money market operations, net liquidity injected (outstanding including today). Signed: negative is absorption. INR crore, as printed in row F. A daily flow position, not the weekly net liquidity series and not net durable liquidity.
- RBI money market operations, net liquidity injected (outstanding including today) (previous reading). Signed: negative is absorption. INR crore, as printed in row F. A daily flow position, not the weekly net liquidity series and not net durable liquidity.
- RBI money market operations, Standing Deposit Facility (SDF) amount. Today's operations only, INR crore, as printed. Before a holiday RBI prints one row per tenor and no total: those days are left blank rather than summed.
- RBI money market operations, Marginal Standing Facility (MSF) amount. Today's operations only, INR crore, as printed. Before a holiday RBI prints one row per tenor and no total: those days are left blank rather than summed.
- RBI money market operations, call money weighted average rate. Unsecured interbank overnight, percent a year, as printed. Dated by the 'as on' business day. A day with no call trades is left blank.
- RBI money market operations, overnight triparty repo weighted average rate. Overnight triparty repo only (term triparty is not read), percent a year, as printed. Dated by the 'as on' business day.
- 3-month Treasury bill benchmark yield, FBIL daily. FBIL T-bill curve, tenor "3 Months". A VALUATION benchmark, not the 91-day PRIMARY AUCTION yield in "91-day Treasury bill yield, primary auction"; never placed in the same column.