Repeating cycle: one lap of the tile silhouette — each new lap resets onto the same loop.
- Jan 1934
- Peak zone — Revaluation / policy era (US Gold Reserve Act lifted the official price to $35/oz) — not a free-market peak like 1980.
- Jan 1980
- Peak zone — Free-market secular peak zone after the 1970s bull market.
- Jan 2026
- Peak zone — Calendar peak-zone marker under study — not a guaranteed top. Observational only, not a predictive model.
- Jan 2072*
- Peak zone — Theoretical next peak-zone marker from the ~46-year spacing — illustrative only.
- ~1954
- Trough zone — Peg era (official US$35/oz) — model trough position only, not a market low.
- ~2000
- Trough zone — Lines up with the 1999–2001 free-market low zone.
- ~2046*
- Trough zone — Theoretical trough zone from the repeating shape — illustrative only.
- ~2092*
- Trough zone — Theoretical trough zone after the 2072* peak (peak + 20y) — illustrative only.
- 15 Aug 1971
- Nixon Shock — end of Bretton Woods dollar convertibility into gold; the usual public date for the US leaving the gold standard. Historical context only, not a cycle peak or trough zone.