Liquidity — the tide that lifts all assets

Liquidity, in the macro sense, is the amount of money and credit sloshing around the financial system looking for a home. It is one of the most powerful and underrated drivers of asset prices.

Two meanings, both worth knowing

• Market liquidity — how easily you can buy or sell an asset without moving its price. Major currencies and large stocks are highly liquid; a small-cap or an exotic currency is not.
• Macro / system liquidity — the overall pool of money created by central-bank policy and the banking system. This is the meaning that drives market regimes.

Why "the tide lifts all boats"

When central banks ease — cutting rates and expanding the money supply — liquidity floods the system. That money has to go somewhere, and a lot of it flows into stocks, bonds, real estate and riskier assets, lifting prices broadly. The post-2008 and 2020 rallies were powered as much by liquidity as by fundamentals.

When central banks tighten — raising rates and shrinking their balance sheets — liquidity drains away. Risky assets, the ones that benefited most from cheap money, tend to suffer first. This is often described as "the tide going out".

The practical takeaway

Sometimes markets rise or fall in ways that company earnings or economic data alone cannot explain. The missing variable is frequently liquidity — the flow of money created by policy. For an emerging market like Brazil, global liquidity matters enormously: when the Fed tightens and dollars become scarce and expensive, capital tends to leave emerging markets, pressuring the real and the Bovespa regardless of domestic news.