f/overrides/event-backup/fbiix-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
2025-12-17,0.219000
2026-04-01,0.075000
2021-12-28,0.013000
2022-07-01,0.022000
2024-10-04,0.041000
2025-04-04,0.067000
2020-04-03,0.008000
2023-07-07,0.030000
2024-12-18,0.147000
2020-07-10,0.008000
2022-04-01,0.017000
2024-04-05,0.033000
2020-02-14,0.020000
2023-12-20,0.121000
2024-02-09,0.059000
2019-12-27,0.017000
2021-04-05,0.015000
2021-10-01,0.016000
2026-07-10,0.049000
2021-07-02,0.018000
2022-10-07,0.027000
2023-10-06,0.035000
2025-07-11,0.045000
2020-10-02,0.007000
2022-12-21,0.024000
2024-07-05,0.040000
2020-12-29,0.033000
2023-04-05,0.076000
2025-10-03,0.044000