f/overrides/event-backup/iwo-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
2001-12-14,0.033000
2004-06-25,0.037000
2007-06-28,0.111000
2009-12-23,0.142000
2000-09-20,0.010000
2022-12-13,0.509000
2023-03-23,0.459000
2000-12-13,0.048000
2012-06-26,0.193000
2016-09-26,0.247000
2018-09-26,0.293000
2007-09-25,0.206000
2005-03-24,0.096000
2008-12-23,0.262000
2009-09-22,0.069000
2011-03-24,0.079000
2011-09-23,0.161000
2015-07-02,0.310000
2025-09-16,0.367000
2010-09-23,0.103000
2015-12-24,0.420000
2020-03-25,0.319000
2018-07-03,0.315000
2025-12-16,0.728000
2017-09-26,0.267000
2014-03-25,0.229000
2019-03-20,0.311000
2020-09-23,0.328000
2006-06-22,0.062000
2009-07-02,0.082000
2010-03-24,0.127000
2020-06-15,0.317000
2022-03-24,0.224000
2022-06-09,0.247000
2002-12-13,0.070000
2010-12-29,0.018000
2006-03-24,0.036000
2009-03-24,0.050000
2014-09-24,0.210000
2002-06-14,0.030000
2019-12-16,0.493000
2023-09-26,0.455000
2019-06-17,0.325000
2019-09-24,0.390000
2024-12-17,1.049000
2004-12-23,0.050000
2003-06-13,0.057000
2015-09-25,0.218000
2001-06-08,0.020000
2024-03-21,0.342000
2017-12-21,0.397000
2021-03-25,0.224000
2018-03-22,0.304000
2005-09-23,0.075000
2006-12-20,0.075000
2017-07-06,0.382000
2023-12-20,0.583000
2026-06-15,0.452000
2005-06-20,0.076000
2018-12-17,0.358000
2020-12-14,0.307000
2001-03-09,0.018000
2001-10-01,0.039000
2003-12-12,0.070000
2010-07-02,0.103000
2022-09-26,0.631000
2025-03-18,0.382000
2003-03-07,0.029000
2007-12-27,0.107000
2010-12-22,0.228000
2011-12-22,0.225000
2012-03-23,0.174000
2021-06-10,0.129000
2021-12-13,0.283000
2002-03-08,0.009000
2013-03-25,0.211000
2007-03-23,0.073000
2017-03-24,0.322000
2025-06-16,0.321000
2013-09-24,0.240000
2008-03-24,0.097000
2014-12-24,0.361000
2024-09-25,0.541000
2004-03-26,0.043000
2013-12-23,0.290000
2024-06-11,0.371000
2013-07-02,0.228000
2014-07-02,0.233000
2003-12-16,0.048000
2003-12-31,0.005000
2004-09-24,0.030000
2015-03-25,0.296000
2016-03-23,0.257000
2016-12-22,0.518000
2026-03-17,0.095000
2008-09-24,0.086000
2011-07-05,0.105000
2006-09-26,0.077000
2012-12-19,0.785000
2012-09-24,0.242000
2023-06-07,0.349000
2005-12-22,0.082000
2003-09-12,0.037000
2008-07-02,0.113000
2016-07-06,0.464000
2021-09-24,0.300000
2002-09-13,0.061000