Global Liquidity

4.1 The tide

"Some traders believe that the single biggest driver of crypto's long-term price isn't adoption, or halvings, or technology," said Hash. "It's global liquidity: how much money is sloshing around the financial system."

Node, the stock investor, nodded. "There's an old saying in markets: liquidity is the tide that lifts all boats."

"And when the tide goes out," said Hash, "you find out who's been swimming without a swimsuit."

4.2 What liquidity means here

In Module 1, liquidity meant how easily you can trade an asset without moving its price. In macro, liquidity means something broader: the overall amount of money and credit available in the financial system, and how easily it flows into investments.

When liquidity is abundant, money is cheap and plentiful, and some of it flows into riskier assets. When liquidity is tight, money is scarce and expensive, and risky assets tend to struggle.

4.3 How central banks create and remove liquidity

Beyond interest rates (Chapter 2), central banks influence liquidity through their balance sheets.

Quantitative easing (QE). The central bank creates new money and uses it to buy government bonds and other assets. This pushes money into the financial system, lowers long-term interest rates, and encourages investment in riskier assets.

Quantitative tightening (QT). The central bank shrinks its balance sheet, letting bonds mature without replacing them, or selling them. This drains money from the financial system.

Tool	Effect on liquidity	When used
Rate cuts	Increases	Weak economy, low inflation
Quantitative easing	Increases	Crises, very weak economy
Rate hikes	Decreases	High inflation
Quantitative tightening	Decreases	After periods of QE, when inflation is high

During the 2020 pandemic, major central banks expanded their balance sheets dramatically through QE, alongside large government spending. Crypto's massive 2020 to 2021 rally happened during this flood of liquidity. QT, combined with rate hikes, followed in 2022. The US Federal Reserve ended its QT programme on 1 December 2025, halting the runoff of its balance sheet.

Chapter 4 · Quantitative easing and tightening

Under quantitative easing, the central bank creates money to buy government bonds, raising bank reserves and lowering long-term rates, which loosens financial conditions. Under quantitative tightening, bonds mature or are sold, reserves fall and conditions tighten, draining liquidity from risk assets.

4.4 Measuring liquidity

There's no single official measure of global liquidity. Analysts use several proxies:

Measure	What it captures	Limitations
Central bank balance sheets	Assets held by major central banks, combined in dollar terms	Exchange rates affect combined totals
Money supply (M2)	Cash, deposits, and similar money in an economy	Definitions vary across countries
Global M2	Money supply across major economies, converted to dollars	Highly sensitive to the dollar's value
Net liquidity measures	For example, the Fed's balance sheet minus certain government and money market accounts	Methodology varies by analyst
Credit conditions	How easily businesses and households can borrow	Harder to measure directly
Stablecoin supply	Dollar liquidity inside crypto (Module 6, Chapter 8)	Crypto-specific, not global

Some analysts have noted that Bitcoin's price has historically tracked measures of global M2 or central bank liquidity, often with a lag of some weeks or months. Others caution that such relationships depend heavily on which measure, which period, and which lag you choose, which risks finding patterns that aren't really there.

"So the liquidity charts look convincing," said Node, "but there are a lot of ways to draw them."

"That's the honest summary," said Hash. "Liquidity clearly matters. How precisely it predicts crypto prices is much less certain."

4.5 Why crypto is especially sensitive

Crypto may be more sensitive to liquidity than many other assets:

1. No cash flows to anchor value for most tokens (Module 5, Chapter 1), so prices depend heavily on how much money wants exposure.
2. High beta. Crypto tends to amplify moves in broader risk assets.
3. Leverage. Cheap money encourages leverage, which amplifies rallies and crashes (Module 7).
4. Marginal buyer. When liquidity is abundant, speculative capital reaches further out on the risk spectrum, and crypto sits far out on it.

4.6 Liquidity and the crypto cycle

Liquidity environment	Typical crypto behaviour
Expanding: rate cuts, QE, growing credit	Supportive; speculative phases more likely
Stable	Crypto-specific factors matter more
Contracting: rate hikes, QT, tightening credit	Headwind; crashes and long bear markets more likely

Chapter 9 explores whether Bitcoin's famous four-year cycle is really a halving cycle, or partly a liquidity cycle.

4.7 Liquidity in a crisis

In financial crises, liquidity can vanish suddenly. In March 2020, as the pandemic hit, investors rushed for cash and sold almost everything, including gold and Bitcoin. Bitcoin lost roughly half its value within about a day. Then central banks flooded markets with liquidity, and risk assets, including crypto, rallied strongly in the following months.

The pattern of a crash followed by a liquidity-driven recovery has appeared in several crises. But it depends on central banks being able and willing to respond, which may be harder when inflation is already high.

4.8 Try it yourself

Find a chart of the US Federal Reserve's balance sheet over the past six years. Mark when it expanded and when it contracted. Then compare it with Bitcoin's price over the same period. Next, find a chart of global M2 and see whether it tells the same story. Note how the conclusions might change if you shifted the timing by a few months.

Key takeaways from this chapter

1. In macro, liquidity means the overall amount of money and credit flowing through the financial system.
2. Central banks add liquidity through rate cuts and quantitative easing, and remove it through rate hikes and quantitative tightening.
3. Liquidity can be measured through central bank balance sheets, money supply, net liquidity measures, and credit conditions.
4. Bitcoin has historically tracked some liquidity measures, but the relationship depends on method and timing.
5. Crypto may be especially sensitive to liquidity because of its lack of cash flows, high beta, leverage, and position on the risk spectrum.
6. In crises, liquidity can vanish suddenly, and recoveries often depend on central bank responses.