f/overrides/event-backup/ijh-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
2013-03-25,0.070000
2023-06-07,0.151200
2003-09-15,0.024500
2005-06-21,0.031000
2006-09-27,0.045200
2018-12-17,0.093000
2025-12-16,0.330000
2001-06-11,0.016300
2004-06-28,0.027900
2005-12-23,0.053400
2007-03-26,0.082000
2011-12-22,0.072200
2003-06-16,0.022500
2015-03-25,0.096200
2004-03-29,0.024400
2013-06-26,0.088800
2003-03-10,0.019500
2017-09-26,0.126800
2011-03-25,0.044600
2022-09-26,0.270000
2004-12-27,0.034600
2011-09-26,0.058400
2022-03-24,0.169400
2012-06-19,0.058600
2012-12-19,0.117000
2014-06-24,0.077600
2017-03-24,0.106800
2006-03-27,0.040400
2007-06-29,0.041200
2020-03-25,0.160200
2000-09-20,0.020400
2005-03-28,0.045600
2018-09-26,0.168400
2022-06-09,0.158000
2019-03-20,0.140200
2020-09-23,0.166600
2021-06-10,0.147600
2024-03-21,0.160000
2010-06-23,0.039200
2016-03-23,0.105600
2020-06-15,0.129800
2024-06-11,0.161000
2003-12-15,0.028800
2021-03-25,0.133400
2002-03-11,0.016900
2008-06-24,0.052800
2010-09-24,0.049800
2007-12-27,0.053800
2009-12-24,0.067400
2014-03-25,0.088000
2022-12-13,0.216800
2025-03-18,0.163000
2026-03-17,0.157000
2009-06-23,0.037000
2005-09-26,0.036800
2017-06-27,0.120400
2021-09-24,0.195800
2023-03-23,0.189400
2001-12-17,0.020100
2003-12-31,0.004700
2006-06-23,0.004400
2008-12-24,0.076600
2014-12-24,0.133400
2019-12-16,0.182000
2012-03-26,0.051600
2003-12-16,0.020300
2017-12-19,0.098600
2024-09-25,0.239000
2026-06-15,0.189000
2023-12-20,0.241200
2012-09-25,0.063000
2016-09-26,0.141800
2019-06-17,0.175400
2019-09-24,0.171600
2024-12-17,0.267000
2009-09-23,0.040400
2008-03-25,0.034800
2008-09-25,0.053200
2011-06-23,0.047800
2016-06-21,0.121200
2018-03-22,0.140000
2001-10-02,0.021800
2002-06-17,0.020900
2004-09-27,0.028000
2010-03-25,0.039400
2000-06-21,0.006800
2006-12-21,0.059200
2013-09-24,0.090200
2018-06-26,0.169600
2009-03-25,0.040200
2016-12-21,0.159200
2023-09-26,0.227600
2002-12-16,0.014400
2014-09-24,0.089400
2015-12-24,0.138200
2021-12-13,0.193200
2025-09-16,0.212000
2002-09-16,0.020200
2007-09-26,0.042800
2015-06-24,0.094600
2015-09-25,0.105800
2020-12-14,0.132000
2000-12-13,0.050000
2025-06-16,0.190000
2010-12-23,0.062800
2013-12-23,0.096400
2001-03-12,0.021400