f/overrides/event-backup/hdrvx-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
2016-09-27,0.125000
2021-03-31,0.062000
2021-12-22,0.310000
2025-09-30,0.105000
2015-12-30,0.062000
2019-06-28,0.131000
2020-03-31,0.065000
2020-06-30,0.132000
2025-12-09,1.079000
2018-09-28,0.133000
2018-12-20,0.186000
2019-09-30,0.171000
2025-06-30,0.149000
2017-03-28,0.048000
2020-12-21,0.093000
2022-03-31,0.065000
2022-09-30,0.211000
2024-03-28,0.078000
2024-12-10,0.683000
2019-03-29,0.062000
2017-09-29,0.130000
2019-12-19,0.084000
2020-09-30,0.173000
2023-09-29,0.214000
2016-12-27,0.057000
2018-06-29,0.128000
2021-09-30,0.184000
2022-12-22,0.135000
2024-06-28,0.141000
2026-03-31,0.076000
2026-06-30,0.184000
2018-03-29,0.063000
2016-06-27,0.114000
2021-06-30,0.134000
2023-03-31,0.067000
2023-12-11,0.054000
2025-03-31,0.071000
2016-03-28,0.059000
2017-12-21,0.068000
2022-06-30,0.137000
2023-06-30,0.137000
2024-09-30,0.109000
2017-06-27,0.159000