f/overrides/event-backup/eqrr-dividend.csv
Greg Pomerantz bb8e39605e Event-history protection: backup dir, empty-download fallback, docs
Yahoo's 2026 event-feed change (capitalGain events dropped for some
funds; no events at all for terminated tickers) can wipe good event
history on re-download. Defense in depth:

- overrides/event-backup/: last-known-good copy of every dividend/
  capitalGain file (8,192 files, 58 MB); refresh with
  scripts/backup_events.py after each dump update
- data.py event_file(): frozen > data-root (while populated) > backup;
  used by panel reads, verify_official, and the double-listing scanner
- README: capital-gain files are mutual-fund-only in this dump; Yahoo
  has no LT/ST split (tax.py taxes capg at lt_rate; the per-fund split
  would come from fund-company annual tax statements or commercial feeds)
- tests: exact Timestamp .loc keys (pandas 3.x string matching returns a
  Series on large DatetimeIndex)
2026-08-31 21:59:25 -04:00

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Date,Dividends
2020-03-25,0.224000
2024-03-20,0.268000
2024-06-26,0.333000
2018-09-26,0.325000
2018-12-26,0.285000
2020-09-23,0.165000
2025-09-24,0.233000
2018-03-21,0.159000
2019-09-25,0.227000
2017-09-27,0.141000
2021-06-22,0.187000
2022-09-21,0.319000
2023-12-20,0.512000
2024-09-25,0.325000
2024-12-23,0.303000
2025-12-24,0.219000
2018-06-20,0.149000
2019-12-24,0.265000
2020-06-24,0.167000
2020-12-23,0.270000
2021-09-22,0.262000
2026-06-24,0.198000
2019-06-25,0.183000
2021-03-23,0.119000
2022-03-23,0.131000
2023-03-22,0.284000
2023-06-21,0.403000
2019-03-20,0.219000
2022-06-22,0.368000
2025-03-26,0.341000
2026-03-25,0.233000
2021-12-23,0.302000
2022-12-22,0.370000
2023-09-20,0.288000
2025-06-25,0.299000
2017-12-26,0.179000