The cyclically adjusted price-to-earnings ratio for the S&P 500 sits at 40–42. Only two periods in history have seen this level: 1929, just before the Great Depression, and 2000, at the peak of the dot-com bubble. The code does not lie, but it can be misunderstood. This metric, developed by Robert Shiller in the 1980s, uses ten years of inflation-adjusted earnings to smooth out cyclical noise. It is not a timing tool. It is a valuation compass. And right now, it points to a market that has priced in decades of optimism. I have been through enough cycles—from auditing ICO contracts in 2017 to building slippage-protection bots during the DeFi summer—to know that when the compass breaks, the ship drifts.
Bitcoin is now part of that ship. The approval of spot ETFs in 2024 turned it from a niche asset into a portfolio allocation for institutional investors. But that integration comes with a cost. In recent cycles, Bitcoin has behaved as a high-beta version of the Nasdaq, with a 97% correlation to global liquidity, as Raoul Pal noted. The same liquidity that lifted stocks lifted Bitcoin. The same liquidity that drains them will drain it. The context matters because the CAPE ratio is not a standalone signal for Bitcoin. It is a signal for the system in which Bitcoin now trades.
Core
Let me state the obvious: Bitcoin has no earnings. It cannot be valued by CAPE. But the CAPE ratio is a proxy for expected returns in the equity market. When CAPE is above 30, the subsequent ten-year real return on stocks tends to be below 2%, often negative. This is based on historical data from over a century. If the largest asset class on the planet offers low or negative real returns, capital will search for alternatives. Bitcoin’s fixed supply and non-sovereign nature make it a candidate. This is the “digital gold” argument. But the road is not direct.
First, the correlation problem. In 2022, when the Fed raised rates, both stocks and Bitcoin fell. Bitcoin dropped 65% from its peak. The reason was liquidity contraction. The CAPE ratio was already elevated at 35, but the trigger was monetary policy. Raoul Pal’s data shows Bitcoin’s price is 87% tied to global liquidity. If the CAPE ratio is a warning sign of future low returns, the immediate trigger for a market correction is usually a liquidity event—a rate hike, a credit crunch, or a geopolitical shock. Until that trigger happens, the market can stay expensive. The CAPE ratio was above 30 for most of 1996–2000 before the crash. Traders who shorted in 1996 lost money for four years.
Second, the decoupling possibility. Some analysts argue that a stock market crash could actually benefit Bitcoin if it triggers a loss of confidence in fiat systems. In 2020, during the COVID crash, Bitcoin initially fell with stocks, then recovered faster and went on to new highs. But that was a liquidity crisis followed by unprecedented monetary expansion. The current environment is different: inflation is still above target, and central banks are hesitant to cut rates. A crash now might not be met with immediate easing.
I saw this firsthand during the winter solvency audit in 2022. When Terra collapsed, I audited the reserve proofs of five major lending protocols. I found hidden solvency issues and advised my community to exit three days before the crash. The lesson was that trust is a liability. The same applies to the stock market. When CAPE is this high, the market is running on trust that future earnings will justify current prices. If that trust breaks, the fall is fast. And Bitcoin, as a high-beta asset, will fall first.
But there is a deeper layer. The ETF structure has created a new feedback loop. When stocks fall, ETF redemptions force Bitcoin sales. When stocks rise, inflows push Bitcoin up. This strengthens the correlation. The contrarian view is that this correlation is a feature, not a bug. The institutional adoption that legitimizes Bitcoin also ties it to the legacy system. The code does not lie: Bitcoin’s blockchain is independent, but its price is not.
Contrarian
The retail narrative is that Bitcoin is a hedge against everything. The smart money knows it is a risk-on asset with a correlation to liquidity. The contrarian angle here is that the CAPE signal is not a sell signal for Bitcoin. It is a signal to prepare for a regime change. The most dangerous position is to be over-leveraged in a market that is pricing in perfection. The 1929 crash took two years to bottom. The 2000 crash took three years. Bitcoin did not exist then. Now it does, and it is part of the system. The real blind spot is the assumption that Bitcoin will decouple immediately. In the silence of the dip, the weak hands break. The strong hands wait for the decoupling to happen after the initial liquidation. Trust is earned in drops and lost in buckets.
Takeaway
Watch the CAPE ratio. If it breaks above 44, the 2000 peak, the signal is critical. If it starts to decline from 40, that is a sign of reversion. Position defensively: reduce leverage, hold cash, and wait for the decoupling signal. The liquidity is the only truth. The code does not lie, but the market’s timing is a mystery. Be patient. The dip will come, and then the real opportunity will appear.
