What it measures
The Long Watch is the multi-decade lens. It averages the percentile rank of three long-horizon dimensions: how far real US equities sit above their 30-year trailing average (mean-reversion lens), what the cost of capital is relative to history (inverted real Fed funds rate), and where the equity market sits relative to the size of the economy (Buffett Indicator). The composite reads where the long arc stands — not the cycle, the arc.
Why these three
Most market reads focus on the 6-to-18 month cycle. The Long Watch ignores that and asks: across the last 30 years and the next 30, what is the position? Real S&P deviation captures mean reversion — when equities are far above their long trend, the gravity of history will eventually pull them back. Real Fed funds inverted captures policy posture — when capital is cheap for years on end, asset prices ride the easy money. Buffett captures the capital-to-economy ratio — when equity value far outruns the GDP that produces earnings, the gap will close one way or another.
How to read it
0-25 (CALM): the long arc is at a generational low — assets cheap relative to their own multi-decade norms. 25-50 (WATCHFUL): below norm but rising. 50-75 (ELEVATED): meaningfully above the long arc. 75-100 (MANIA): the long arc is stretched in ways history says do not last. A reading here does not say the next quarter will break — it says what the next thirty years will be made of.
What it does not say
Long Watch is for stewards thinking about generational wealth and institutional posture, not traders timing the next month. The 1929-1942 trough sat in the CALM band for nearly a decade. The 1995-2000 stretch sat in MANIA before resolving. A high reading right now (the current reading) tells you that returns over the next 30 years from this starting position will likely be lower than the historical average — not that 2026 will be bad.
Revision — 24 September 2026
The Buffett Indicator component had frozen at September 2025 when its source, the Wilshire 5000, left FRED. It now reads the Federal Reserve's own measure — corporate equities at market value ÷ GDP — current to the latest quarter and rolled forward monthly. History was recomputed.