f/overrides/event-backup/aqeix-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
2012-12-28,0.066000
2018-12-28,2.991000
2019-12-27,1.730000
1997-12-30,1.834000
2009-12-22,0.305000
1999-09-30,0.058000
2013-12-27,0.950000
2023-12-27,0.439000
1997-03-31,0.062000
2005-12-27,0.396000
1996-09-30,0.060000
2002-12-27,0.010000
2020-12-29,1.181000
1996-12-30,0.798000
2008-12-23,0.551000
2015-12-29,1.166000
2022-12-28,0.911000
2000-03-31,0.057000
2003-09-30,0.008000
2003-12-18,0.177000
2004-12-17,0.257000
2007-12-12,0.675000
1998-03-31,0.066000
2001-09-28,0.001000
2001-12-31,0.028000
2005-06-30,0.007000
2006-12-26,0.499000
2000-06-30,0.050000
2010-12-30,0.006000
1996-06-28,0.062000
1999-03-31,0.053000
2014-12-29,1.631000
2025-12-30,1.059000
1998-09-30,0.056000
2006-12-28,0.447000
2004-06-30,0.004000
1998-12-29,2.296000
2000-09-29,0.041000
1999-06-30,0.055000
2003-06-30,0.012000
2011-12-29,0.018000
2017-12-28,1.417000
1997-09-30,0.068000
2000-12-27,0.143000
2024-12-27,1.389000
1997-06-30,0.063000
1999-12-23,1.826000
2016-12-29,1.220000
1998-06-30,0.063000
2021-12-29,2.462000
2005-03-31,0.008000
2007-12-28,1.648000
2001-03-30,0.003000