What Is the Global Liquidity Index — and Why It Leads the Nasdaq
If you only watch one macro number for the stock market, make it liquidity. The Global Liquidity Index (GLI) aggregates the money and credit flowing through the world's major economies — and historically, it turns before the Nasdaq does.
What “global liquidity” actually means
Global liquidity is the total pool of money and credit available across the major economies. In practice it has two big pieces: the balance sheets of the major central banks (the Fed, ECB, Bank of Japan, People's Bank of China and Bank of England) and broad money — the M2 money supply held by households and businesses.
Why does it matter for stocks? Because when that pool expands, the new money has to go somewhere. A meaningful share finds its way into risk assets — and few assets are more sensitive to the liquidity tide than the Nasdaq, with its long-duration, growth-heavy companies. When liquidity contracts, the tide goes out and those same names feel it first.
Why liquidity leads the stock market
The key insight is that liquidity is an input and prices are the output. Capital doesn't reprice every asset the instant a central bank acts — it works through the system: into bank reserves, money-market funds, credit, and finally into equities. That transmission takes time.
Empirically, that lag is roughly 80 trading days — about four monthsbetween a turn in global liquidity and the Nasdaq following. That lead is exactly what makes liquidity useful as a forecast rather than a coincident indicator that only confirms what already happened.
How the Global Liquidity Index is built
limacro's GLI combines, all converted into a common currency:
- Central-bank balance sheets from five major economies — including the Fed measured net of the Treasury's cash balance and reverse-repo drains, plus the ECB, BoJ, PBoC and BoE.
- Broad money — US M2 and China M2.
A detail worth knowing: the index is dominated by broad money — roughly three-quarters M2, with China's money supply the single largest driver. That's why the line is relatively smooth and upward-biased over time, and why it behaves differently from a pure central-bank-only liquidity gauge. We then track its rate of change and shift it forward to line it up with where the Nasdaq has historically gone next.
How to read the signal
A raw index isn't actionable on its own, so limacro distils it into four conviction tiers:
- High Conviction Bullish — liquidity expanding and confirmed by consumer sentiment.
- Strong Bullish — liquidity clearly expanding.
- Neutral — the picture is mixed; no directional edge.
- Strong Bearish — liquidity contracting.
Strong calls only fire when the data warrants them; when the macro picture is muddy, the model says Neutral instead of forcing a view. Across 2010–2026, the directional calls were on the right side of the Nasdaq about 81% of the time — you can see the full, colour-coded track record on the homepage and the live breakdown on the dashboard.
Honest limitations
- It's monthly at the core. M2 and several central-bank series are published with a few weeks' lag, so the freshest reading firms up around the middle of the following month.
- It's a tide, not a wave. The GLI describes a ~4-month directional drift — it will not call next week's wiggle, and it's not a day-trading tool.
- Bearish calls are rarer and less reliable. Because broad money trends upward over time, contractions are infrequent and the model is more confident on the bullish side than the bearish one.