Question 1

Is the US stock market in a bubble in 2026?

Accepted Answer

Based on 6 independent indicators, the US stock market is currently in the DANGER zone. The Shiller CAPE Ratio is approximately 39x (vs. a historical mean of 17.3x), the Buffett Indicator (market cap/GDP) is near 210%, and both Forward P/E and credit spreads signal extreme overvaluation. The composite BUBBLE score reflects historically rare levels of market pressure, comparable to conditions seen before the 2000 dot-com crash.

Question 2

What is the Buffett Indicator and what does it say about 2026?

Accepted Answer

The Buffett Indicator is the ratio of total US stock market capitalization to US GDP, popularized by Warren Buffett. At 100% it signals fair value; above 150% it signals overvaluation. In 2026, the Buffett Indicator is near 210% — approaching an all-time high — meaning the US stock market is worth more than twice the entire US economy. Warren Buffett himself holds a record $334 billion in cash, implying he finds few attractive opportunities at current prices.

Question 3

What is the Shiller CAPE Ratio and why does it matter?

Accepted Answer

The Shiller CAPE (Cyclically Adjusted Price-to-Earnings) Ratio, developed by Nobel laureate Robert Shiller, divides the S&P 500 price by its 10-year average inflation-adjusted earnings. The historical mean is 17.3x. At 39x, the current CAPE is 126% above its long-run average — levels only surpassed during the 2000 dot-com peak (44.2x) and briefly in January 2022. High CAPE readings have historically predicted below-average long-term equity returns.

Question 4

How is the BUBBLE score calculated?

Accepted Answer

The BUBBLE score is a weighted composite of 6 indicators, each normalized to a 0–100 scale against historical mean, safe, and danger thresholds. Weights: CAPE Ratio (27%), Buffett Indicator (27%), HY Credit Spread (20%), Forward P/E (11%), Fear & Greed (10%), VIX (5%). Scores above 70 indicate DANGER; above 85 indicate EXTREME risk. Low credit spreads and low VIX both invert — low readings signal more danger, not less.

Question 5

What does mean reversion in the stock market mean?

Accepted Answer

Mean reversion is the mathematical tendency of any indicator to return toward its long-run historical average. For stock market valuation, it means that when CAPE or the Buffett Indicator are far above their historical means, future returns are typically lower as prices eventually fall back toward fair value — either through actual price declines or through earnings growing faster than prices over many years. A full reversion from today's CAPE of 39x back to the historical mean of 17.3x implies approximately a 56% decline in the S&P 500.

Question 6

What is the Fear & Greed Index?

Accepted Answer

The Fear & Greed Index, developed by CNN Business, is a composite sentiment measure that scores market psychology from 0 (Extreme Fear) to 100 (Extreme Greed). It combines market momentum, stock price breadth, put/call ratio, junk bond demand, safe haven demand, and volatility. High greed historically precedes market corrections; extreme fear often marks buying opportunities. The BUBBLE dashboard tracks the live reading and 365-day history.