f/overrides/event-backup/mhyzx-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
2022-09-13,0.122000
2024-06-13,0.058000
2025-01-27,0.044000
2022-06-14,0.119000
2022-12-13,0.260000
2023-05-11,0.046000
2024-02-13,0.046000
2019-06-17,0.139000
2024-04-11,0.054000
2023-10-12,0.056000
2020-09-15,0.145000
2023-11-10,0.057000
2024-03-13,0.048000
2024-05-13,0.056000
2024-08-15,0.071000
2025-06-26,0.065000
2026-04-27,0.057000
2019-03-15,0.096000
2023-01-12,0.013000
2024-01-11,0.014000
2025-02-26,0.062000
2026-06-25,0.061000
2019-09-16,0.222000
2025-05-27,0.056000
2026-01-27,0.042000
2026-07-28,0.059000
2021-09-14,0.125000
2021-03-16,0.083000
2024-07-11,0.062000
2020-06-15,0.117000
2025-10-27,0.057000
2025-12-16,0.079000
2022-03-15,0.073000
2026-03-26,0.062000
2024-10-10,0.053000
2025-03-27,0.065000
2025-07-28,0.059000
2026-02-24,0.049000
2023-07-13,0.052000
2020-12-15,0.221000
2023-12-13,0.133000
2024-09-12,0.055000
2025-11-24,0.053000
2026-05-27,0.054000
2019-12-16,0.262000
2023-08-11,0.050000
2025-09-25,0.058000
2021-12-14,0.526000
2025-08-27,0.057000
2025-04-28,0.067000
2021-06-15,0.122000
2023-03-13,0.063000
2020-03-16,0.067000
2023-04-13,0.052000
2024-11-13,0.061000
2023-02-13,0.045000
2023-09-13,0.052000
2024-12-12,0.106000
2023-06-13,0.055000