Objective
Extend QQQ history (Nasdaq-100; ~24 strategies).
Notes: QQQ←^NDX free Yahoo; monthly corr ~0.999; unlocks 1985+; RYOCX TR alt shorter (1994+); no email. Findings qqq-history-t165.md.
Approach
Reuses existing report research/findings/qqq-history-t165.md — tables/metrics preserved verbatim via source_report pointer. Body below summarizes grounded evidence from that report and adjacent artifacts.
Files / code / data changed
Associated commits (inferred from log grep t165):
3d730f57research: t165 QQQ←^NDX history proxy (1985+) (#168)3cf74a3dresearch: note t164 main land; handoff t165 QQQ3d730f57research: t165 QQQ←^NDX history proxy (1985+) (#168)- Source report:
research/findings/qqq-history-t165.md - Task-history entry:
research/findings/task-history.json#t165
Results
Key table from source report (preserved):
| Layer | Source | Start | Monthly corr vs QQQ |
|---|---|---|---|
| Live | QQQ | 1999-03-10 | — |
| Default | ^NDX (Nasdaq-100 price) | 1985-10-01 | 0.999 (n=328) |
| TR fund alt (shorter) | RYOCX (Rydex Nasdaq-100) | 1994-02-14 | 0.999 |
| Same era / no depth | NASDX / USNQX | 2000+ | ~0.999 |
| Composite / broader | FNCMX / ONEQ | 2003+ | ~0.96–0.98 |
| Ticker rename | QQQQ | — | delisted / empty on Yahoo |
Conclusions and metrics are in research/findings/qqq-history-t165.md; see detail page for preserved tables/metrics.
Conclusions
QQQ←^NDX free Yahoo; monthly corr ~0.999; unlocks 1985+; RYOCX TR alt shorter (1994+); no email. Findings qqq-history-t165.md.
Problems / follow-ups
- See source report or PR discussion for follow-ups. No unsupported follow-ups fabricated.
Links
- Task-history:
research/findings/task-history.jsonidt165 - Findings:
research/findings/qqq-history-t165.md - Commits:
3d730f57,3cf74a3d