cx history
the published level of the century-index from its base date to 2026-09-29. one CX is the basket that cost $1 on 2022-01-07; today it costs $1.42. every price enters as a trailing 365-day average, so the series moves at the pace of a year, not a day — which is what a century-scale obligation asks of it.
reading
- since 2022-01-07 the basket returned +42.9% in dollars
- the last twelve months: +6.1%
- the range since the base date: 0.83 low, 1.46 high
quantities
fixed on 2022-01-07, unchanged since — the obligation is these quantities, not the number they priced at.
| leg | quantity | unit | fix at base | weight |
|---|---|---|---|---|
| BTC | 0.000004197 | BTC | 47,642.04 | 20% |
| ETH | 0.000053024 | ETH | 2,828.89 | 15% |
| CNY | 0.96724 | CNY | 0.155079 | 15% |
| USD | 0.15000 | USD | 1 | 15% |
| GOLD | 0.000083486 | troy oz | 1,796.69 | 15% |
| CU | 0.000010687 | tonne | 9,357.05 | 10% |
| OIL | 0.0007021 | bbl | 71.20 | 5% |
| UX | 0.0015148 | lb U3O8 | 33.00 | 5% |
monthly level
| month | level | month | level |
|---|---|---|---|
| 2022-01 | 1.01 | 2024-06 | 1.03 |
| 2022-02 | 1.01 | 2024-07 | 1.05 |
| 2022-03 | 1.02 | 2024-08 | 1.08 |
| 2022-04 | 1.03 | 2024-09 | 1.10 |
| 2022-05 | 1.02 | 2024-10 | 1.12 |
| 2022-06 | 1.01 | 2024-11 | 1.15 |
| 2022-07 | 1.01 | 2024-12 | 1.18 |
| 2022-08 | 0.99 | 2025-01 | 1.20 |
| 2022-09 | 0.97 | 2025-02 | 1.22 |
| 2022-10 | 0.95 | 2025-03 | 1.22 |
| 2022-11 | 0.92 | 2025-04 | 1.23 |
| 2022-12 | 0.89 | 2025-05 | 1.24 |
| 2023-01 | 0.87 | 2025-06 | 1.25 |
| 2023-02 | 0.86 | 2025-07 | 1.28 |
| 2023-03 | 0.85 | 2025-08 | 1.31 |
| 2023-04 | 0.83 | 2025-09 | 1.34 |
| 2023-05 | 0.83 | 2025-10 | 1.38 |
| 2023-06 | 0.83 | 2025-11 | 1.39 |
| 2023-07 | 0.83 | 2025-12 | 1.40 |
| 2023-08 | 0.84 | 2026-01 | 1.41 |
| 2023-09 | 0.84 | 2026-02 | 1.42 |
| 2023-10 | 0.85 | 2026-03 | 1.44 |
| 2023-11 | 0.86 | 2026-04 | 1.45 |
| 2023-12 | 0.88 | 2026-05 | 1.46 |
| 2024-01 | 0.90 | 2026-06 | 1.46 |
| 2024-02 | 0.92 | 2026-07 | 1.44 |
| 2024-03 | 0.95 | 2026-08 | 1.43 |
| 2024-04 | 0.97 | 2026-09 | 1.42 |
| 2024-05 | 1.00 | — | — |
sources
this series is a reconstruction from free public data — evidence and orientation, never the contractual fix. a signed annex names its own sources with fallbacks, per the cessation waterfall in century-index.
| leg | source | observed range |
|---|---|---|
| BTC | Coinbase BTC-USD daily close | 2021-01-07 … 2026-09-29 · 2092 observations |
| ETH | Coinbase ETH-USD daily close | 2021-01-07 … 2026-09-29 · 2092 observations |
| CNY | ECB reference rate via Frankfurter | 2021-01-07 … 2026-09-28 · 1467 observations |
| USD | quote currency, fixed at 1 | 2021-01-07 … 2021-01-07 · 1 observations |
| GOLD | LBMA gold PM fix (USD) | 1968-04-01 … 2026-09-28 · 14692 observations |
| CU | IMF global copper price via FRED (monthly) | 1992-01-01 … 2026-07-01 · 415 observations |
| OIL | Brent Europe spot via FRED (daily) | 1987-05-20 … 2026-09-22 · 9092 observations |
| UX | IMF uranium price via FRED (monthly) | 1992-01-01 … 2026-07-01 · 415 observations |
copper and uranium publish monthly and carry forward between prints, as a closed market does. the uranium assessment is the weakest fix in the basket, which is why it carries the smallest weight.
drift
quantities never change, so shares do. the basket was written at 35% crypto, 30% fiat, 35% elements; since 2022-01-07 bitcoin and ether have given up 2.1 points of share against the rest, leaving the basket at 32.8% crypto today. this is the arithmetic of fixed quantities, not a flaw in the fixes — but over a 25-80 year lease it is the property that decides what the obligation actually tracks: the basket rides with the world, as the quantities were written.
what a lease actually paid
the machinery of §2 run from the base date: the basket priced in bitcoin, each annual step collared at +35%/−15%, the dual floor holding underneath. a lease signed on 2022-01-07 at one CX of rent invoiced $0.99 in its first year and $2.49 in its last — +25.6% a year, compounded.
| year | basket in btc | rent owed | invoice | set by |
|---|---|---|---|---|
| 2022-01-07 | 0.00002098 | 0.00002098 | $0.99 | basket |
| 2023-01-07 | 0.00003219 | 0.00003617 | $0.99 | dollar floor |
| 2024-01-07 | 0.00003038 | 0.00003403 | $0.99 | dollar floor |
| 2025-01-07 | 0.00001772 | 0.00002892 | $1.93 | collar, fall held |
| 2026-01-07 | 0.00001386 | 0.00002458 | $2.49 | collar, fall held |
of the 4 anniversaries after signing: the basket set the rent outright in 0 years, the collar capped a rise in 0 and held a fall in 2, the dollar floor bound in 2 and the satoshi floor in 0. where a floor bound, the tenant owed year-zero money regardless of the basket — the dollar leg when bitcoin had fallen, the satoshi leg when it had outrun the basket: the protocol's bitcoin-standard reading. where the collar held a fall, the rent in sats came down 15% a year while the basket in sats fell faster; the dollar invoice still moved with bitcoin.
today
| leg | fix (usd) | share |
|---|---|---|
| BTC | 79,902.48 | 23.4% |
| ETH | 2,522.29 | 9.3% |
| CNY | 0.145157 | 9.8% |
| USD | 1 | 10.4% |
| GOLD | 4,444.45 | 25.9% |
| CU | 12,687.61 | 9.4% |
| OIL | 85.75 | 4.2% |
| UX | 67.85 | 7.1% |
the fix is published daily at cyberia.my/cx and rebuilt from source by cx. generated 2026-09-29.