f/overrides/event-backup/hfxi-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
2025-12-19,0.723000
2026-03-20,0.097000
2017-12-28,0.136000
2018-03-22,0.065000
2018-12-27,0.306000
2019-06-24,0.305000
2020-06-24,0.159000
2021-06-21,0.316000
2021-12-20,0.224000
2023-12-15,0.194000
2022-12-16,0.489000
2025-09-19,0.199000
2016-06-22,0.159000
2017-06-21,0.237000
2019-03-25,0.163000
2020-03-25,0.089000
2020-12-30,0.122000
2022-03-18,0.058000
2015-12-29,0.141000
2016-09-22,0.068000
2018-09-21,0.095000
2019-09-24,0.132000
2024-12-20,0.260000
2020-09-24,0.084000
2026-06-18,0.227000
2017-03-23,0.072000
2021-03-22,0.106000
2022-06-17,0.330000
2023-09-15,0.110000
2024-03-15,0.032000
2024-06-21,0.333000
2019-12-30,0.093000
2022-09-16,0.115000
2023-03-17,0.137000
2024-09-20,0.073000
2016-12-28,0.336000
2017-09-22,0.108000
2018-06-21,0.321000
2021-09-20,0.130000
2023-06-16,0.178000
2025-06-20,0.438000