f/overrides/event-backup/mtodx-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
2024-11-29,0.062000
2022-03-31,0.044000
2022-05-31,0.074000
2023-08-31,0.048000
2024-01-31,0.046000
2024-03-28,0.065000
2025-03-31,0.062000
2018-10-31,0.030000
2021-03-31,0.076000
2026-06-30,0.066000
2026-07-31,0.052000
2019-09-30,0.047000
2019-12-19,0.806000
2023-03-31,0.059000
2024-05-31,0.063000
2025-06-30,0.064000
2025-07-31,0.040000
2019-04-30,0.043000
2019-06-28,0.054000
2023-12-21,0.084000
2025-05-30,0.084000
2018-08-31,0.048000
2020-04-30,0.024000
2019-02-28,0.050000
2021-08-31,0.037000
2025-12-18,0.050000
2018-09-28,0.044000
2018-11-30,0.055000
2019-03-29,0.059000
2019-10-31,0.032000
2020-05-29,0.046000
2020-10-30,0.040000
2021-05-28,0.054000
2024-12-18,0.075000
2018-07-31,0.034000
2019-01-31,0.047000
2023-01-31,0.029000
2023-05-31,0.078000
2026-04-30,0.070000
2020-01-31,0.034000
2021-12-16,1.191000
2021-07-30,0.033000
2022-07-29,0.026000
2024-07-31,0.037000
2025-10-31,0.049000
2020-02-28,0.043000
2020-03-31,0.051000
2021-11-30,0.037000
2022-04-29,0.035000
2022-06-30,0.047000
2022-08-31,0.044000
2023-06-30,0.047000
2023-10-31,0.031000
2018-06-29,0.060000
2021-04-30,0.049000
2024-08-30,0.059000
2025-08-29,0.055000
2026-01-30,0.090000
2026-02-27,0.060000
2023-11-30,0.042000
2024-06-28,0.068000
2019-05-31,0.097000
2019-08-30,0.048000
2018-03-29,0.047000
2018-04-30,0.052000
2024-09-30,0.051000
2020-08-31,0.042000
2021-01-29,0.057000
2022-10-31,0.029000
2019-11-29,0.051000
2020-07-31,0.033000
2021-06-30,0.050000
2022-11-30,0.058000
2022-12-21,0.034000
2023-07-31,0.037000
2023-09-29,0.043000
2024-04-30,0.068000
2018-05-31,0.082000
2020-11-30,0.040000
2025-11-28,0.024000
2021-02-26,0.074000
2021-09-30,0.044000
2022-09-30,0.039000
2024-02-29,0.053000
2024-10-31,0.035000
2025-09-30,0.021000
2018-12-20,0.373000
2020-09-30,0.039000
2026-03-31,0.066000
2022-02-28,0.041000
2023-04-28,0.047000
2025-02-28,0.072000
2025-04-30,0.057000
2026-05-29,0.094000
2020-06-30,0.045000
2022-01-31,0.028000
2021-10-29,0.022000
2023-02-28,0.053000
2025-01-31,0.053000
2019-07-31,0.047000
2020-12-17,0.044000