f/overrides/event-backup/hqivx-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
2025-06-26,0.102000
2025-09-26,0.099000
2017-03-30,0.106000
2019-12-27,0.105000
2020-12-29,0.125000
2021-06-28,0.077000
2015-03-30,0.091000
2019-12-10,1.262000
2022-03-29,0.110000
2016-03-30,0.107000
2016-06-29,0.093000
2016-12-28,0.101000
2018-06-28,0.104000
2021-03-29,0.114000
2025-03-27,0.116000
2026-03-27,0.116000
2014-12-30,0.108000
2021-12-10,1.659000
2016-12-16,0.595000
2017-09-28,0.094000
2019-09-27,0.091000
2023-09-27,0.106000
2024-06-26,0.095000
2026-06-26,0.079000
2017-12-27,0.112000
2018-12-17,1.437000
2020-06-26,0.080000
2020-12-10,0.200000
2023-12-11,1.081000
2024-03-26,0.137000
2024-09-26,0.108000
2014-12-12,0.524000
2019-06-27,0.103000
2020-03-27,0.116000
2020-09-28,0.075000
2022-12-12,2.155000
2025-12-29,0.121000
2016-09-29,0.091000
2017-12-15,1.039000
2019-03-28,0.107000
2015-12-29,0.102000
2021-12-29,0.139000
2022-06-28,0.113000
2023-06-28,0.091000
2023-12-27,0.173000
2024-12-11,1.644000
2024-12-27,0.149000
2018-09-27,0.093000
2022-12-28,0.159000
2015-06-29,0.112000
2015-09-29,0.107000
2021-09-28,0.093000
2022-09-28,0.108000
2025-12-11,2.283000
2017-06-29,0.088000
2018-03-28,0.110000
2018-12-27,0.126000
2023-03-29,0.126000
2015-12-11,1.399000