Common mistakes about liquidity

The common belief: Liquidity is a vague synonym for “money in the system,” and it sits in the background of markets rather than driving them.

What the data shows: Global liquidity is better understood as the changing capacity of the financial system to fund positions, and its swings track risk-asset cycles closely. When the Fed balance sheet expanded to a peak of roughly $8.97 trillion in April 2022 (FRED) and then contracted, the inflection coincided with major shifts in equity and credit valuations. The relationship is not mechanical, but liquidity is a foreground variable, not background noise.

→ The full explanation: What is global liquidity and how does it move financial markets?

The common belief: The Treasury General Account (TGA) is just the government’s checking account, irrelevant to investors.

What the data shows: The TGA sat below $0.5 trillion before 2020 and rose above $1.5 trillion in 2020 (Richmond Fed), and its swings move bank reserves dollar-for-dollar. Our net-liquidity data sets out how the indicator is built. When the Treasury rebuilds its cash balance, those reserves are sterilized at the Fed rather than circulating, which tightens liquidity even with no change in policy rates. It enters the net liquidity calculation precisely because its level matters.

→ Full breakdown: What is the Treasury General Account and why does it move markets?

The common belief: If you know the central bank’s target rate, you know how restrictive monetary policy is.

What the data shows: Financial conditions indexes combine rates, credit spreads, equity valuations, volatility and the dollar precisely because the policy rate captures only one channel. Conditions can loosen while rates are held high, as rising equities and tightening spreads offset the policy stance. The gap between “policy is tight” and “conditions are tight” is where many forecasts go wrong.

→ Fuller explanation: What are financial conditions indexes and how are they measured?

The common belief: A market is liquid if a lot is being traded.

What the data shows: Volume can be high while liquidity is thin, because what matters is depth, the bid-ask spread, and the price impact of executing size. During stress, volume spikes as participants rush to exit while the cost of trading rises sharply — the opposite of liquid conditions. Measurement focuses on resilience and impact, not headline turnover.

→ Extended explanation: What is market liquidity and how is it measured?

The common belief: Liquidity is one concept; the distinction is academic hair-splitting.

What the data shows: Funding liquidity is the ease of borrowing cash against collateral; market liquidity is the ease of selling an asset without moving its price. The two interact and can spiral together, as in September 2019, when funding stress pushed overnight repo rates from 2.43% to 5.25% in a single day (Federal Reserve). A trader can hold a “liquid” asset and still face a funding squeeze, which is how solvent institutions get caught.

→ The complete explanation: How does funding liquidity differ from market liquidity?

The common belief: More balance sheet means more liquidity; track the headline number and you’ve tracked liquidity.

What the data shows: The liquidity that reaches markets is net of what the Treasury and money markets withdraw, commonly approximated as balance sheet minus the reverse repo facility minus the TGA. Reverse repo balances peaked above $2.5 trillion at the end of 2022 and drained toward zero by late 2025, releasing liquidity even as quantitative tightening removed roughly $2.19 trillion from the balance sheet over the same window (Fed, Cleveland Fed). The headline shrank while net liquidity moved differently, which is exactly the trap.

→ Full account: What is net liquidity and how is it computed?

The common belief: Repurchase agreements are a technical corner of finance, irrelevant to anyone outside a trading desk.

What the data shows: The U.S. repo market averaged about $12.6 trillion in daily exposures in Q3 2025 (OFR), making it one of the largest short-term funding markets in the world and the foundation of SOFR, the benchmark rate behind most dollar contracts. It is the circulatory system through which dealers, banks and money funds move cash and collateral overnight. When it seizes, the disruption transmits to Treasury trading and policy implementation.

→ Complete breakdown: Why do repo markets matter for financial stability?

The common belief: Funding markets only break when the economy is collapsing or borrowers are defaulting.

What the data shows: September 2019 was a liquidity squeeze, not a credit event, triggered by a routine drain of roughly $120 billion as corporate taxes and Treasury settlement coincided, sending overnight rates as high as 10% intraday (OFR). A milder echo appeared in September 2025, when the Standing Repo Facility was tapped for around $18.5 billion in a day, its largest draw since inception. These are plumbing failures that occur amid expansion, not recession.

→ Complete explanation: What happened during the September 2019 repo crisis?

The common belief: The Fed’s liquidity decisions only affect U.S. markets.

What the data shows: Because so much global borrowing is dollar-denominated, a dollar funding squeeze propagates worldwide, and the Fed maintains swap lines with major central banks to relieve offshore dollar shortages during stress — reactivated at scale in March 2020 to keep foreign banks funded. A strong dollar and tight dollar funding have historically coincided with stress in emerging markets, an externality of U.S. plumbing.

→ Detailed explanation: How do central bank swap lines provide global dollar liquidity?

The common belief: Treasury issuance just swaps one asset for another and leaves the banking system untouched.

What the data shows: When buyers pay for new Treasuries and the proceeds land in the TGA, those funds leave bank reserves and sit at the Fed until the government spends them. Bank reserves peaked around $4.25 trillion in December 2021 and fell below $3 trillion by October 2025 (Fed data), driven partly by quantitative tightening and partly by these issuance flows. The composition of who holds the cash matters as much as the total.

→ In-depth explanation: Why does the Treasury General Account drain bank reserves?

The common belief: Money market funds are inert cash equivalents with no systemic role.

What the data shows: Money market fund assets reached a record near $7.9 trillion by mid-2026 (ICI), and where that cash sits — reverse repo, Treasury bills or private repo — shapes liquidity for the whole system. Their shift out of the reverse repo facility into bills was a primary channel through which liquidity re-entered markets in 2023-2025. These funds are active allocators of short-term cash, not passive parking.

→ The full explanation: How do money market funds affect systemic liquidity?