f/overrides/event-backup/ftsm-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
2021-06-30,0.020000
2022-06-30,0.056000
2024-08-30,0.247000
2026-06-30,0.203000
2019-08-30,0.116000
2025-07-31,0.218000
2015-12-23,0.040000
2019-10-31,0.110000
2022-04-29,0.028000
2023-09-29,0.247000
2017-10-20,0.075000
2018-02-21,0.083000
2023-05-31,0.229000
2025-11-28,0.200000
2014-12-23,0.040000
2019-03-29,0.126000
2020-01-31,0.101000
2020-02-28,0.093000
2021-03-31,0.025000
2025-12-29,0.200000
2017-05-23,0.065000
2017-11-21,0.075000
2018-06-21,0.110000
2023-12-26,0.253000
2025-08-29,0.220000
2025-10-31,0.210000
2014-09-23,0.018000
2015-08-21,0.020000
2017-09-21,0.073000
2018-09-14,0.118000
2020-06-30,0.056000
2022-11-30,0.159000
2014-10-21,0.024000
2021-04-30,0.025000
2023-07-31,0.240000
2024-02-29,0.240000
2026-05-29,0.205000
2014-08-21,0.016000
2016-02-23,0.045000
2019-07-31,0.125000
2019-11-29,0.106000
2021-07-30,0.018000
2023-06-30,0.229000
2024-10-31,0.241000
2026-03-31,0.208000
2026-04-30,0.201000
2021-08-31,0.014000
2022-07-29,0.083000
2015-07-21,0.020000
2018-01-23,0.083000
2018-12-18,0.124000
2019-06-28,0.126000
2021-02-26,0.025000
2021-05-28,0.020000
2023-02-28,0.201000
2015-05-21,0.020000
2018-03-22,0.093000
2020-10-30,0.035000
2021-10-29,0.014000
2023-11-30,0.243000
2024-09-30,0.247000
2015-09-23,0.025000
2016-08-23,0.055000
2016-10-21,0.060000
2016-11-22,0.060000
2022-08-31,0.099000
2023-10-31,0.244000
2017-01-20,0.060000
2017-04-21,0.065000
2017-12-21,0.078000
2021-12-23,0.017000
2022-09-30,0.110000
2016-03-23,0.045000
2016-05-20,0.045000
2018-07-20,0.118000
2020-11-30,0.033000
2022-10-31,0.137000
2015-02-20,0.020000
2020-04-30,0.084000
2021-11-30,0.014000
2020-05-29,0.070000
2020-12-24,0.035000
2023-03-31,0.208000
2026-07-31,0.206000
2017-02-22,0.060000
2018-08-21,0.118000
2024-12-27,0.233000
2019-04-30,0.126000
2019-05-31,0.128000
2026-02-27,0.191000
2015-11-20,0.035000
2016-04-21,0.045000
2018-04-20,0.098000
2020-07-31,0.045000
2023-04-28,0.214000
2024-07-31,0.247000
2015-06-24,0.020000
2016-12-21,0.060000
2021-09-30,0.014000
2025-02-28,0.203000
2019-12-26,0.104000
2025-05-30,0.228000
2015-03-25,0.020000
2016-07-21,0.050000
2017-03-23,0.065000
2017-06-22,0.070000
2020-09-30,0.035000
2022-01-31,0.017000
2015-10-21,0.030000
2018-10-23,0.118000
2019-01-31,0.130000
2021-01-29,0.029000
2022-05-31,0.042000
2023-08-31,0.247000
2016-06-22,0.050000
2018-05-22,0.103000
2022-03-31,0.024000
2025-04-30,0.213000
2017-07-21,0.070000
2022-12-23,0.191000
2014-11-21,0.018000
2024-04-30,0.249000
2026-01-30,0.205000
2015-01-21,0.020000
2024-03-28,0.249000
2018-11-21,0.119000
2023-01-31,0.201000
2025-01-31,0.226000
2025-03-31,0.222000
2025-09-30,0.213000
2016-01-21,0.045000
2016-09-21,0.055000
2017-08-22,0.070000
2019-09-30,0.110000
2020-08-31,0.038000
2024-11-29,0.230000
2025-06-30,0.215000
2019-02-28,0.126000
2020-03-31,0.094000
2022-02-28,0.017000
2024-01-31,0.255000
2024-05-31,0.250000
2024-06-28,0.245000