GLD: how its history is extended
GLD returns from its first trading day; earlier history from GC=F, then CEF.
Kind
Backfill chain
Extended from
1986-04-04
Through
2026-09-04
Sources
GLD → GC=F → CEF
Validation at each junction
| Real series | Stands in before it | Real data from | Overlap (years) | Monthly correlation | Return gap (pp/yr) | Gate |
|---|---|---|---|---|---|---|
| GLD | GC=F | 2004-11-18 | 21.79 | 0.9935 | -0.502 | pass (bars: corr ≥ 0.9, |gap| ≤ 1.0pp) |
| GC=F | CEF | 2000-08-30 | 26.01 | 0.889 | 0.583 | pass (bars: corr ≥ 0.9, |gap| ≤ 1.0pp) |
Figures on this page are computed from the data store when the page renders; the gate is re-checked every time an extension is used. Method: the lab's tracking standard, lab.data.chains.