f/overrides/event-backup/ihe-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
2020-03-25,0.195667
2021-09-24,0.277333
2022-06-09,0.239000
2006-12-20,0.040667
2012-09-25,0.220667
2015-03-25,0.085000
2017-03-24,0.119333
2018-12-17,0.117000
2023-12-20,0.134667
2026-03-17,0.284000
2018-06-26,0.163000
2022-12-13,0.445667
2024-03-21,0.275000
2009-12-23,0.065667
2012-06-19,0.103000
2013-03-25,0.100000
2014-06-24,0.253000
2016-12-21,0.112667
2013-06-26,0.108667
2018-09-26,0.132000
2019-06-17,0.178333
2020-09-23,0.236333
2025-12-16,0.585000
2016-06-21,0.111333
2019-03-20,0.185667
2024-09-25,0.359000
2007-03-23,0.050333
2007-12-27,0.040000
2011-09-23,0.084000
2011-12-22,0.072333
2012-03-26,0.100000
2018-03-22,0.176667
2023-03-23,0.224000
2024-06-11,0.294000
2008-03-25,0.060333
2011-03-25,0.069000
2013-12-27,0.021000
2025-03-18,0.292000
2021-06-10,0.240333
2025-06-16,0.307000
2010-09-23,0.073333
2013-12-23,0.091667
2015-09-25,0.127000
2016-03-23,0.102667
2019-09-24,0.210000
2006-09-26,0.031667
2007-09-25,0.050667
2008-12-23,0.060667
2010-06-24,0.074000
2016-09-26,0.105333
2017-09-26,0.150000
2015-06-24,0.129333
2017-06-27,0.306000
2017-12-19,0.124000
2022-09-26,0.295000
2024-12-17,0.211000
2010-12-22,0.086000
2014-09-24,0.131333
2019-12-16,0.171667
2023-06-07,0.196667
2023-09-26,0.300667
2008-09-24,0.093667
2020-12-14,0.175333
2021-03-25,0.211667
2022-03-24,0.264667
2025-09-16,0.312000
2009-03-25,0.077333
2011-06-24,0.075333
2012-12-19,0.134333
2009-06-24,0.069333
2009-09-22,0.052000
2010-03-25,0.063333
2020-06-15,0.104667
2026-06-15,0.285000
2014-12-24,0.128667
2015-12-24,0.696667
2021-12-13,0.263333
2006-06-22,0.036667
2007-06-28,0.043333
2008-06-25,0.032667
2013-09-24,0.096667
2014-03-25,0.093000