f/overrides/event-backup/dxhyx-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
2018-03-16,0.131000
2019-09-17,0.089000
2022-09-16,0.196000
2023-02-16,0.106000
2024-02-16,0.079000
2024-08-16,0.079000
2018-07-17,0.048000
2018-10-16,0.117000
2022-01-19,0.091000
2023-06-16,0.064000
2021-10-18,0.056000
2022-08-16,0.035000
2024-04-16,0.107000
2024-09-17,0.073000
2025-11-18,0.040000
2026-05-18,0.040000
2019-07-16,0.077000
2021-08-17,0.044000
2024-01-17,0.143000
2016-08-16,0.050000
2020-10-16,0.003000
2025-09-16,0.058000
2018-05-16,0.044000
2018-08-16,0.065000
2019-01-02,1.441000
2020-04-16,0.076000
2022-03-16,0.192000
2017-06-16,0.056000
2017-10-17,0.058000
2018-04-17,0.017000
2026-03-17,0.035000
2021-06-16,0.029000
2024-07-16,0.063000
2016-11-16,0.077000
2018-02-16,0.081000
2020-01-02,0.087000
2016-04-18,0.152000
2017-05-16,0.065000
2023-08-16,0.034000
2017-03-16,0.077000
2023-03-16,0.277000
2023-07-18,0.042000
2017-07-18,0.060000
2020-03-17,0.743000
2020-07-16,0.037000
2020-11-17,0.012000
2024-11-18,0.060000
2023-04-18,0.144000
2025-02-19,0.081000
2016-06-16,0.061000
2019-03-18,0.127000
2023-01-18,0.103000
2024-05-16,0.014000
2017-08-16,0.066000
2020-08-18,0.057000
2021-03-16,0.049000
2018-01-02,0.325000
2017-01-03,0.123000
2021-09-16,0.047000
2025-04-16,0.170000
2025-06-17,0.063000
2026-01-16,0.057000
2019-02-19,0.127000
2021-05-18,0.033000
2020-02-19,0.013000
2016-09-16,0.062000
2016-10-18,0.063000
2017-11-16,0.171000
2022-10-18,0.003000
2019-10-16,0.064000
2023-10-17,0.071000
2026-02-18,0.077000
2026-04-16,0.056000
2017-02-16,0.052000
2017-04-18,0.059000
2019-04-16,0.128000
2025-05-16,0.195000
2026-07-16,0.064000
2019-11-18,0.047000
2020-09-16,0.132000
2022-02-16,0.788000
2025-10-16,0.090000
2016-05-17,0.061000
2021-07-16,0.035000
2024-06-18,0.054000
2020-06-16,0.069000
2024-03-18,0.074000
2026-06-16,0.070000
2022-11-16,0.095000
2022-04-19,0.055000
2023-09-18,0.048000
2019-06-18,0.040000
2016-12-01,0.243000
2017-09-18,0.066000
2025-08-18,0.050000
2024-10-16,0.082000
2025-03-18,0.066000
2018-06-18,0.039000
2018-11-16,0.119000
2021-04-16,0.025000
2021-02-17,0.111000
2025-01-16,0.036000
2023-11-16,0.011000
2018-09-18,0.109000
2020-05-18,0.115000
2023-05-16,0.147000
2025-07-16,0.066000
2019-05-16,0.081000
2021-11-16,0.012000
2022-06-16,0.547000