f/overrides/event-backup/dfip-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
2022-03-22,0.125000
2022-09-20,0.468000
2023-11-21,0.154000
2023-12-19,0.083000
2024-06-18,0.286000
2025-05-20,0.260000
2022-01-19,0.041000
2022-02-23,0.111000
2025-08-19,0.164000
2025-12-16,0.291000
2023-06-21,0.163000
2025-01-22,0.008000
2024-07-16,0.187000
2024-11-19,0.104000
2026-07-21,0.463000
2022-07-19,0.286000
2023-04-18,0.232000
2022-06-22,0.260000
2022-10-18,0.079000
2023-05-23,0.249000
2023-07-18,0.179000
2024-08-20,0.083000
2025-04-22,0.225000
2021-12-16,0.279000
2022-05-24,0.263000
2025-07-22,0.170000
2026-06-23,0.462000
2024-05-21,0.316000
2025-06-24,0.173000
2022-04-19,0.178000
2023-10-24,0.170000
2024-04-16,0.161000
2024-09-17,0.065000
2024-12-17,0.188000
2025-03-25,0.145000
2025-10-21,0.145000
2021-11-23,0.001000
2022-08-23,0.340000
2023-08-22,0.163000
2025-02-19,0.034000
2025-09-23,0.165000
2026-04-21,0.100000
2026-05-19,0.241000
2022-11-22,0.100000
2022-12-20,0.205000
2025-11-18,0.176000
2026-08-18,0.293000
2023-09-19,0.126000
2024-10-22,0.105000