f/overrides/event-backup/herz-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
2005-12-28,1.692456
2008-12-10,2.040619
2015-12-29,1.547389
2018-12-06,2.949710
2022-08-19,1.740000
1998-12-29,0.116054
2021-11-18,0.530000
2022-02-17,2.650000
2024-06-03,1.350000
2011-12-13,0.609284
2013-12-04,11.025145
2014-12-26,6.141199
2020-09-17,1.499033
2023-05-19,1.740000
2024-03-26,1.350000
2026-06-16,0.170000
2017-12-06,1.141199
2020-12-17,1.499033
2021-08-27,2.562863
2022-11-17,1.740000
2024-12-31,2.330000
2026-04-24,0.170000
2001-12-27,1.499033
2006-12-13,9.671180
2016-12-05,1.305609
2022-05-20,2.650000
2023-12-28,1.350000
2012-12-14,1.895551
2019-09-19,2.756286
2020-03-19,2.756286
2021-03-17,1.499033
2025-12-31,6.870000
2026-07-17,0.170000
2026-08-17,0.170000
1996-12-27,0.116054
2002-12-27,0.744681
2019-12-19,2.756286
2020-06-18,1.499033
2025-11-21,6.870000
2026-05-15,0.170000
1994-12-23,0.116054
1997-12-29,0.116054
2007-12-10,12.379110
2021-06-18,1.499033
2023-02-14,1.740000
2025-05-23,2.330000