Why Liquidity Drives Bull Markets (More Than Earnings)

The standard narrative of financial markets teaches that asset prices reflect the present value of future earnings. While theoretically sound, this framework dramatically understates the role of liquidity — the supply of money available to purchase assets — in driving market cycles.

The empirical evidence is striking. Between 2009 and 2022, S&P 500 earnings grew approximately 3x. But the index itself grew nearly 6x. The difference — multiple expansion from 12x to 22x — was driven almost entirely by the Federal Reserve's quantitative easing programs, which suppressed discount rates and pushed investors into risk assets.

The mechanism: when central banks buy bonds, they inject cash into the financial system. This cash needs somewhere to go. With bond yields near zero, it flows into equities, real estate, private equity, and alternative assets. Even without improving fundamentals, asset prices inflate because more dollars are chasing the same assets.

This is why it is more accurate to say that bull markets are primarily liquidity events, not earnings events. When the Fed expanded its balance sheet by $4T in 2020 alone, the S&P 500 rallied 100% in 18 months — not because corporate earnings were great (they collapsed), but because liquidity was infinite.