f/overrides/event-backup/etegx-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
2017-12-12,1.090000
2019-12-05,0.659000
2020-08-18,0.128000
2008-03-11,0.756000
2015-12-15,1.484000
2018-12-07,1.364000
1998-12-22,0.019048
2012-03-13,0.433000
2014-12-16,3.260000
2004-01-15,0.030950
2019-08-08,0.289000
2023-12-12,0.096000
2024-12-10,0.405000
2017-07-26,0.360000
2007-12-24,0.479000
2010-04-30,0.030000
2016-06-15,0.411000
2021-12-07,2.162000
2015-05-21,1.352000
2020-12-08,0.027000
1999-12-14,0.017460
2012-12-20,0.550000
2016-12-13,1.357000
2025-12-09,1.099000
2013-08-01,0.008000
2013-12-17,1.069000
2022-12-13,0.411000