f/overrides/event-backup/ijr-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
2011-12-22,0.122000
2016-12-21,0.270500
2023-12-20,0.283000
2003-09-15,0.035833
2024-09-25,0.515000
2015-03-25,0.210000
2002-12-16,0.032833
2019-09-24,0.285000
2021-06-10,0.253000
2001-03-12,0.020000
2004-12-27,0.065500
2015-06-24,0.179000
2013-06-26,0.134000
2014-09-24,0.156000
2018-06-26,0.247000
2019-03-20,0.260000
2001-06-11,0.018000
2021-03-25,0.266000
2005-12-23,0.064500
2007-06-29,0.132000
2008-06-24,0.078000
2021-09-24,0.501000
2019-12-16,0.411000
2020-03-25,0.252000
2006-12-21,0.079500
2025-03-18,0.323000
2014-12-24,0.228500
2006-09-27,0.062500
2017-09-26,0.226000
2020-12-14,0.248000
2008-09-25,0.089500
2000-09-20,0.014167
2002-09-16,0.028833
2025-09-16,0.444000
2003-06-16,0.034833
2007-09-26,0.061500
2012-06-19,0.135500
2017-12-19,0.265000
2023-03-23,0.329000
2024-03-21,0.326000
2010-09-24,0.074500
2025-06-16,0.388000
2008-03-25,0.037000
2009-03-25,0.062000
2012-12-19,0.297500
2010-12-23,0.165500
2011-03-25,0.065000
2022-06-09,0.302000
2000-06-21,0.007167
2009-06-23,0.057000
2012-09-25,0.101500
2006-06-23,0.052500
2009-12-24,0.085000
2007-12-27,0.095500
2016-03-23,0.209500
2016-09-26,0.176500
2000-12-13,0.202667
2001-10-02,0.033833
2022-03-24,0.169000
2003-03-10,0.024333
2004-03-29,0.035833
2014-06-24,0.159500
2019-06-17,0.251000
2022-12-13,0.412000
2026-03-17,0.194000
2017-03-24,0.224000
2010-03-25,0.063000
2010-06-23,0.065500
2020-09-23,0.289000
2002-06-17,0.025500
2003-12-15,0.040833
2021-12-13,0.734000
2023-06-07,0.351000
2009-09-23,0.063500
2012-03-26,0.112000
2026-06-15,0.433000
2011-09-26,0.093000
2014-03-25,0.156000
2018-12-17,0.321000
2005-09-26,0.051500
2011-06-23,0.070000
2013-03-25,0.114000
2013-12-23,0.175000
2005-03-28,0.082000
2015-12-24,0.249500
2018-03-22,0.239000
2022-09-26,0.455000
2002-03-11,0.018167
2004-06-28,0.050500
2006-03-27,0.058500
2015-09-25,0.179000
2017-06-27,0.206000
2001-12-17,0.024833
2004-09-27,0.047167
2005-06-21,0.052500
2025-12-16,0.572000
2024-06-11,0.386000
2008-12-24,0.125000
2013-09-24,0.123500
2023-09-26,0.459000
2024-12-17,1.138000
2016-06-21,0.178500
2018-09-26,0.287000
2020-06-15,0.235000
2007-03-26,0.057500