f/overrides/event-backup/ewz-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
2007-12-24,1.202000
2010-06-23,0.275000
2015-06-25,0.611000
2015-12-21,0.233000
2025-12-30,0.106000
2000-12-20,0.005000
2016-12-21,0.395000
2008-12-29,0.207000
2011-12-20,0.421000
2013-06-27,0.853000
2016-06-22,0.208000
2021-12-13,1.984000
2026-06-15,0.331000
2005-12-23,0.583000
2010-12-21,2.333000
2017-06-20,0.277000
2024-12-17,1.092000
2003-12-16,0.028000
2012-12-27,0.129000
2000-08-24,0.364000
2003-12-22,0.256000
2003-12-31,0.014000
2006-12-20,0.869000
2018-06-19,0.531000
2019-12-16,0.577000
2011-06-22,1.084000
2014-12-17,0.418000
2025-06-16,0.515000
2001-08-24,0.638000
2018-12-18,0.574000
2019-06-17,0.531000
2021-06-10,0.626000
2021-12-30,0.161000
2024-06-11,0.914000
2009-06-23,0.415000
2017-12-19,0.365000
2019-12-30,0.097000
2020-06-15,0.357000
2006-12-27,0.071000
2010-12-29,0.198000
2012-12-18,0.382000
2014-06-25,0.963000
2002-12-23,0.110000
2004-12-23,0.461000
2009-12-22,2.197000
2013-12-18,0.588000
2017-12-28,0.050000
2022-12-13,2.022000
2023-06-07,0.756000
2023-12-20,1.221000
2009-12-29,0.111000
2022-06-09,1.499000
2008-12-23,1.321000
2025-12-16,1.027000
2008-06-25,0.633000
2020-12-14,0.276000
2012-06-21,1.058000