Read MEI as a regime, not a forecast
MEI maps several market-sentiment channels onto a common 0-100 scale. Scores below 15 are labeled Despair, 15 to below 40 Pessimism, 40 through 60 Neutral, above 60 through 85 Optimism, and above 85 Euphoria.
Those labels describe the current mix of market conditions. They do not estimate the probability, timing, or size of the next market move.
Why a composite is useful
Valuation, volatility, and investor risk appetite often disagree. Combining several inputs makes the headline regime less dependent on any one series.
Published inputs include CARP, NBI, VIX, and margin debt relative to GDP. Additional inputs and weighting remain proprietary, so the public methodology explains what the score means without exposing enough detail to reconstruct the complete model.
Where sentiment composites fail
Euphoria can persist while prices continue rising, and despair can deepen before a durable recovery begins. MEI therefore should not be read as a contrarian turning-point trigger.
Its inputs also respond to markets at different speeds. A fast volatility shock can move sentiment before slower valuation or leverage measures have changed much.
What an extreme reading actually tells you
An extreme score says the observable ingredients in the composite are unusually aligned toward fear or optimism on the Grizzly Bulls scale. It does not say that every component is extreme or that history must repeat.
The useful question is how unusual the current regime is relative to the indicator history, which is why the page reports empirical calibration from the history available to the reader.
Low example
51.0
Apr 8, 2025
Median score
78.5
Selected sample
Average score
76.5
Selected sample
High example
92.4
May 29, 2026
Regime frequency in this sample| Regime | Observations | Share |
|---|
| Despair | 0 | 0.0% |
| Pessimism | 0 | 0.0% |
| Neutral | 60 | 5.0% |
| Optimism | 885 | 74.4% |
| Euphoria | 245 | 20.6% |
These frequencies describe the selected historical sample. They are not probabilities for future returns or market turning points.