f/overrides/event-backup/ixg-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
2022-12-13,1.068000
2011-12-19,0.468000
2012-06-20,0.717000
2013-12-17,0.486000
2014-12-19,0.529000
2020-12-14,0.604000
2021-12-30,0.035000
2022-06-09,1.537000
2023-06-07,1.132000
2023-12-20,0.928000
2026-06-15,1.763000
2005-12-23,1.196000
2009-12-21,0.384000
2018-06-19,1.146000
2020-06-15,0.784000
2021-06-10,0.280000
2010-06-21,0.566000
2015-12-21,0.669000
2024-06-11,1.460000
2024-12-17,1.074000
2003-12-16,0.143000
2008-06-23,1.356000
2017-06-20,0.828000
2018-12-18,0.638000
2019-06-17,1.152000
2002-12-23,0.571000
2007-12-24,2.780000
2009-06-22,0.449000
2012-12-17,0.417000
2014-06-24,0.813000
2001-12-24,0.043000
2008-12-22,0.659000
2016-06-21,0.867000
2025-12-16,1.069000
2013-06-25,0.719000
2017-12-21,0.652000
2025-06-16,1.398000
2019-12-16,0.819000
2003-12-22,1.311000
2004-12-23,0.895000
2006-12-21,1.212000
2010-12-20,0.407000
2011-06-21,0.743000
2015-06-24,0.808000
2016-12-22,0.408000
2021-12-13,1.034000