What Global Liquidity Actually Means
When people in finance talk about "liquidity," they usually mean one of two things. Market liquidity refers to how easily you can buy or sell an asset without moving its price. Monetary liquidity refers to the total amount of money and near-money circulating in the global financial system. The second definition is what drives macro cycles, and it is measured primarily through central bank balance sheets and M2 money supply.
M2 includes cash, checking deposits, savings deposits, money market funds, and other near-cash instruments. When you aggregate M2 across the US Federal Reserve, European Central Bank, Bank of Japan, People's Bank of China, Bank of England, Bank of Canada, Reserve Bank of Australia, and Swiss National Bank, you get a single number that represents the total pool of money circulating in the global financial system.
US M2 reached a record high in 2025, growing at approximately 4.6% year-over-year by December. This marked the fastest pace of expansion since July 2022, a clear shift from the contraction that occurred in 2022-2023.
The Bitcoin-Liquidity Correlation
Lyn Alden commissioned a research report in September 2024 (written by Sam Callahan) quantifying the relationship between global liquidity and Bitcoin. The key finding: Bitcoin moves in the direction of global M2 83% of the time, more than any other major asset class. Between May 2013 and July 2024, Bitcoin's price exhibited a correlation of 0.94 with global liquidity.
The correlation is not instantaneous. M2 data needs to be shifted forward by roughly 70-90 days to reveal the underlying relationship. One analysis found an 84-day lag. Coinbase Institutional suggested a global M2-style liquidity index can lead Bitcoin by approximately 110 days. The lag exists because money supply changes take time to flow through the financial system and reach risk assets.
The Mechanism Is Straightforward
Central bank asset purchases push down yields on government bonds. Investors who held those bonds now hold cash and go looking for returns elsewhere. They buy corporate bonds, pushing those yields down. Corporate bond holders rotate into equities. Equity investors move into riskier assets. Each step pushes capital further out on the risk spectrum. In a tightening cycle, the process reverses.
Michael Howell, author of Capital Wars, identifies three main drivers of global liquidity: the US Federal Reserve, the People's Bank of China, and banks lending through collateral markets. He also identifies indirect influences (world business cycle, oil prices, dollar strength, bond market volatility) that act with a lag of 6-15 months.
Why the Cycle Is Not Perfectly Synchronized
Global liquidity is not one uniform wave. Different central banks operate on different timelines. The Fed might be tightening while the PBOC is easing. The BOJ might maintain ultra-loose policy while the ECB raises rates. The aggregate global number matters, but the composition also matters.
US dollar liquidity has an outsized impact because the dollar is the world's reserve currency and most global trade is dollar-denominated. A contraction in dollar liquidity tightens financial conditions everywhere, even in countries whose own central banks are easing.
Practical Application for Traders
Tracking global liquidity is not about making binary "risk on" or "risk off" calls. It is about understanding the macro environment your trades are operating in. A momentum strategy in crypto will perform differently when global M2 is expanding at 8% year-over-year versus contracting at 3%. The same technical setup on a chart means different things depending on whether the liquidity backdrop is supportive or hostile.
The most useful approach is monitoring the aggregate global M2 growth rate and its rate of change. When global M2 growth is accelerating, risk assets tend to outperform. When it is decelerating (even if still positive), relative performance shifts toward safer assets. The acceleration, not the level, is what moves prices at the margin.
For crypto specifically, stablecoin supply (USDT, USDC, DAI) shows an even stronger correlation with Bitcoin than M2 does. Stablecoin market cap can be thought of as a more direct measure of capital sitting in crypto, ready to be deployed. Watching both global M2 and stablecoin supply gives you two complementary lenses on the same underlying liquidity dynamic.
Explore these tools on Blockcircle: Momentum Trading Engine | Global Liquidity Scorecard