f/overrides/event-backup/atrfx-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
2023-05-30,0.012000
2023-12-28,0.033000
2025-12-30,0.001000
2026-03-30,0.005000
2015-12-21,0.099000
2023-03-30,0.016000
2018-12-14,0.106000
2023-11-29,0.029000
2024-04-29,0.023000
2024-06-27,0.019000
2024-09-27,0.016000
2024-12-30,0.866000
2014-12-18,0.063000
2016-12-29,0.086000
2025-03-28,0.009000
2025-10-30,0.004000
2019-03-28,0.045000
2022-12-13,0.502000
2023-09-28,0.030000
2024-05-30,0.027000
2024-11-27,0.017000
2025-08-28,0.006000
2019-01-30,0.045000
2019-02-27,0.027000
2025-04-29,0.009000
2023-07-28,0.019000
2023-08-30,0.032000
2024-08-29,0.196000
2025-01-30,0.013000
2026-01-29,0.013000
2023-04-27,0.013000
2023-06-29,0.017000
2025-09-29,0.005000
2019-12-19,0.156000
2024-01-30,0.016000
2024-03-27,0.021000
2024-10-30,0.019000
2025-06-27,0.008000
2019-04-29,0.024000
2021-12-14,0.600000
2024-02-28,0.021000
2024-07-30,0.019000
2025-02-27,0.010000
2025-05-29,0.008000
2025-07-30,0.008000
2025-11-26,0.003000
2020-12-21,1.939000
2023-10-30,0.029000