TL;DR
- The net liquidity formula is: Fed Balance Sheet (WALCL) minus the Treasury General Account (TGA) minus the Overnight Reverse Repo Facility (ON RRP)
- When net liquidity rises, risk assets like $SPY tend to follow — when it falls, markets feel the drain
- As of March 25, 2026, net liquidity stood at $5.78T, with WALCL at $6.66T, TGA at $0.87T, and RRP at $0
- You can track all three components live on Acid Capitalist's Liquidity Tracker
What Is Net Liquidity — The Simple Version
Imagine the Fed's balance sheet as a giant water tank sitting above the financial system. When the tank is full and the tap is open, money flows freely through the pipes — into banks, into markets, into risk assets. But two buckets sit underneath that tank and catch water before it reaches the system: the Treasury General Account and the Overnight Reverse Repo Facility. Whatever those buckets capture never makes it into the economy.
Net liquidity is what's left after you account for those buckets.
More precisely: net liquidity = Fed balance sheet (WALCL) − Treasury General Account (TGA) − Overnight Reverse Repo (ON RRP).
That's the whole formula. Three inputs, one subtraction sign.
The Fed's balance sheet (tracked as WALCL on FRED) represents the total assets the Fed holds — primarily Treasuries and mortgage-backed securities accumulated through years of quantitative easing. When the Fed buys assets, it creates reserves and pumps money into the system. When it lets assets roll off through quantitative tightening, it drains them.
But the balance sheet alone doesn't tell you how much of that money is actually loose in the financial system. The TGA is the U.S. government's checking account at the Fed — when Treasury runs a surplus or issues a lot of debt, that cash piles up in the TGA and sits idle, off the table. The ON RRP is a parking lot where money market funds and banks can stash cash overnight in exchange for a small yield — money sitting in that lot isn't circulating either.
Subtract both, and you get the water that's actually flowing through the pipes.
Why Net Liquidity Matters for Investors
Markets don't move on vibes. They move on money — specifically, how much of it is sloshing through the financial system at any given moment. Net liquidity is the closest single number we have to measuring that.
The relationship isn't subtle. During 2020–2021, the Fed's balance sheet exploded from roughly $4T to $9T, the RRP was near zero, and the TGA was being drawn down. Net liquidity surged. $SPY went from 220 to 480. Crypto went parabolic. Meme stocks happened. That wasn't irrational exuberance in a vacuum — it was what happens when you flood the system with $5 trillion in net liquidity.
Then came 2022. The Fed began QT, the TGA refilled after the debt ceiling was resolved, and the RRP swelled to over $2.5 trillion as money market funds parked cash rather than deploy it into a rising-rate environment. Net liquidity collapsed. $SPY dropped nearly 25% peak to trough.
The mechanism is direct: when net liquidity rises, banks and institutions have excess reserves. Those reserves need somewhere to go. They flow into risk assets — equities, credit, anything with a yield above cash. When liquidity drains, the reverse happens. Institutions pull back, credit tightens, and the marginal buyer disappears.
This is why macro traders watch net liquidity more closely than any single economic data point. CPI prints, jobs reports, and Fed speeches are weather. Net liquidity is the tide. You can fight the weather. You can't fight the tide.
How Net Liquidity Works — The Details
Let's build the formula from scratch using real numbers.
The formula:
Net Liquidity = WALCL − TGA − ON RRP
The March 25, 2026 snapshot:
- WALCL: $6.66T
- TGA: $0.87T
- ON RRP: $0B
- Net Liquidity: $5.78T
Check the math: $6.66T − $0.87T − $0 = $5.78T. That's it.
Breaking down each component:
WALCL (Fed Balance Sheet) — This is the Fed's total asset holdings, updated weekly on FRED every Thursday afternoon. It moves slowly — QT has been grinding it down from the $9T peak at roughly $60–95B per month. Think of this as the size of the water tank. It changes, but not overnight.
TGA (Treasury General Account) — This one moves fast and is the most volatile component. When Treasury issues new debt (T-bills, notes, bonds), the cash from those sales flows into the TGA and sits there until the government spends it. A swelling TGA is a liquidity drain — it's money that left the private sector and is now locked in the government's account. When Treasury spends that cash, it flows back out into the system. The TGA hit $0.87T on March 25, 2026 — a meaningful drag. Watch the TGA around debt ceiling negotiations and quarterly refunding announcements; it can swing by hundreds of billions in weeks.
ON RRP (Overnight Reverse Repo) — The Fed's parking lot. Since 2021, this facility exploded as money market funds parked trillions overnight rather than take duration risk in a rising-rate world. At its peak in mid-2023, ON RRP held over $2.5T — that's $2.5T sitting idle, not circulating. By March 2026, it had drained to essentially zero, meaning that particular drag on liquidity had fully unwound. When the RRP drains, that money re-enters the system — it's like the parking lot emptying at rush hour and all those cars hitting the highway at once.
What changes net liquidity:
- Fed buys assets (QE) → WALCL rises → Net liquidity rises
- Fed lets assets roll off (QT) → WALCL falls → Net liquidity falls
- Treasury issues debt and parks cash → TGA rises → Net liquidity falls
- Treasury spends down its balance → TGA falls → Net liquidity rises
- Money market funds park cash at Fed → RRP rises → Net liquidity falls
- Money market funds redeploy cash → RRP falls → Net liquidity rises
The current picture (March 25, 2026): with RRP at zero, the only remaining drags are QT (slowly shrinking WALCL) and TGA dynamics. The $0.87T TGA balance is the variable to watch — if Treasury starts drawing it down aggressively, net liquidity could pop even without any Fed policy change.
How to Use This in Your Investing
You don't need a Bloomberg terminal to track this. All three inputs are freely available on FRED (the St. Louis Fed's database), and Acid Capitalist's Liquidity Tracker pulls them together automatically so you can see the net figure and trend without building your own spreadsheet.
Here's what to watch for:
Direction matters more than level. A net liquidity reading of $5.78T doesn't tell you much in isolation. What tells you something is whether that number has been rising or falling over the past four to eight weeks. A sustained $200B+ rise in net liquidity over a month is historically a tailwind for $SPY. A sustained drain of the same magnitude is a headwind — even if the absolute level looks high.
Watch the TGA around key dates. Quarterly refunding announcements (Treasury publishes these in late January, April, July, and October) telegraph how much debt Treasury plans to issue. Heavy issuance = TGA refill = liquidity drain. Light issuance or drawdowns = liquidity injection. This is a forward-looking signal most retail investors completely ignore.
RRP is now zero — that tailwind is spent. The $2.5T RRP drain that supported markets through 2024–2025 is done. The marginal liquidity support has to come from Fed balance sheet decisions or TGA drawdowns from here. That changes the calculus for what drives the next liquidity surge.
The bottom line: before you react to a Fed headline or a CPI print, check the liquidity trend. If net liquidity is rising, bad news tends to get absorbed. If it's falling, good news tends to get shrugged off. The formula doesn't predict markets — it explains them.
FAQ
Q: Where do I find the data to calculate net liquidity myself? A: All three inputs are free on FRED (fred.stlouisfed.org). Search WALCL for the Fed balance sheet, WTREGEN for the Treasury General Account, and RRPONTSYD for the Overnight Reverse Repo. WALCL and TGA update weekly on Thursdays; the RRP updates daily. Or skip the spreadsheet and use Acid Capitalist's Liquidity Tracker, which calculates it automatically.
Q: Is net liquidity the same as M2 money supply? A: No, and the difference matters. M2 measures money in circulation in the broader economy — checking accounts, savings accounts, money market funds. Net liquidity measures the reserves and cash available in the financial system specifically, which is more directly tied to asset prices. M2 is a consumer economy measure; net liquidity is a markets measure.
Q: Why does the TGA drain increase liquidity? A: When the Treasury draws down its account at the Fed to pay government bills, that cash flows out of the Fed and into the bank accounts of whoever received the government payment — contractors, Social Security recipients, federal employees. Those dollars land in the private banking system, increasing reserves and available liquidity. The TGA is a holding tank; when it empties, the water goes somewhere, and that somewhere is the financial system.
Q: How quickly does net liquidity affect stock prices? A: The lag varies, but historically the correlation between net liquidity direction and $SPY direction shows up most clearly over two-to-six week windows. Short-term noise can overwhelm the signal in any given week. The signal is strongest when liquidity has been moving in one direction consistently for a month or more — that's when the tide analogy really applies.
Q: Does net liquidity work the same way in other countries? A: The same framework applies to other major central banks — ECB balance sheet, BOJ balance sheet — with equivalent adjustments for their reserve facilities. Global net liquidity (aggregating Fed, ECB, BOJ, and PBOC) is an even more powerful signal for global risk assets, since capital flows across borders seeking the highest returns. When all four major central banks are draining simultaneously, there's nowhere to hide.