f/overrides/event-backup/eft-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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Plaintext

Date,Dividends
2008-03-19,0.113000
2015-10-21,0.076000
2017-12-21,0.067000
2018-03-21,0.070000
2026-05-15,0.070000
2009-06-19,0.067000
2010-12-21,0.086000
2024-12-30,0.103000
2006-02-16,0.118000
2014-12-22,0.075000
2005-05-19,0.101000
2008-07-22,0.097000
2018-06-21,0.069000
2007-12-20,0.123000
2010-10-20,0.087000
2015-03-20,0.075000
2015-05-20,0.075000
2017-12-27,0.067000
2025-05-15,0.094000
2012-10-22,0.089000
2017-02-16,0.071000
2019-12-23,0.084000
2020-07-23,0.057000
2022-12-28,0.078000
2024-03-20,0.118000
2024-11-21,0.103000
2009-10-21,0.072000
2017-06-21,0.070000
2023-12-27,0.158000
2024-10-23,0.109000
2005-10-20,0.114000
2013-06-19,0.081000
2013-08-21,0.079000
2022-05-23,0.078000
2007-03-21,0.135000
2009-02-18,0.063000
2009-12-29,0.106000
2014-05-21,0.072000
2010-08-20,0.086000
2018-09-20,0.067000
2024-04-22,0.118000
2021-10-21,0.078000
2026-03-16,0.073000
2006-01-19,0.118000
2023-04-21,0.111000
2007-09-19,0.123000
2008-12-22,0.090000
2015-07-22,0.075000
2009-03-20,0.062000
2012-03-21,0.085000
2013-02-19,0.087000
2013-12-27,0.127000
2018-10-23,0.067000
2023-03-21,0.106000
2006-07-20,0.134000
2008-08-20,0.097000
2008-10-22,0.099000
2016-11-21,0.076000
2016-12-21,0.073000
2013-07-22,0.080000
2015-06-19,0.075000
2025-12-15,0.080000
2011-02-16,0.086000
2013-05-22,0.081000
2019-12-27,0.163000
2021-09-22,0.078000
2007-07-20,0.131000
2014-10-22,0.075000
2016-12-27,0.073000
2019-04-22,0.076000
2022-03-23,0.078000
2005-11-21,0.115000
2006-03-22,0.122000
2006-10-19,0.136000
2012-05-22,0.085000
2020-12-23,0.064000
2015-04-21,0.075000
2021-04-22,0.061000
2007-02-16,0.137000
2012-07-20,0.086000
2015-09-21,0.076000
2007-08-22,0.131000
2011-06-21,0.080000
2016-06-21,0.075000
2022-12-22,0.078000
2023-09-21,0.116000
2012-06-20,0.086000
2014-08-20,0.072000
2018-07-23,0.069000
2022-01-12,0.078000
2023-08-21,0.116000
2007-01-18,0.137000
2008-06-19,0.096000
2012-09-19,0.088000
2015-12-21,0.076000
2025-03-14,0.094000
2006-04-19,0.127000
2010-06-21,0.082000
2014-09-19,0.074000
2014-11-19,0.075000
2020-02-20,0.084000
2020-09-22,0.062000
2025-02-14,0.094000
2015-02-18,0.075000
2023-07-21,0.110000
2024-08-22,0.114000
2005-08-22,0.105000
2004-08-23,0.088000
2011-03-22,0.085000
2019-11-21,0.084000
2020-04-22,0.067000
2017-04-19,0.066000
2023-05-19,0.111000
2024-06-21,0.118000
2026-07-15,0.066000
2022-04-21,0.078000
2006-12-20,0.137000
2014-03-20,0.074000
2014-12-26,0.075000
2015-08-20,0.075000
2017-03-22,0.067000
2017-08-22,0.069000
2019-06-20,0.076000
2025-11-14,0.086000
2010-03-22,0.085000
2010-11-19,0.087000
2011-07-20,0.080000
2012-02-17,0.083000
2025-12-30,0.086000
2006-06-21,0.131000
2008-02-20,0.118000
2009-05-20,0.067000
2010-07-21,0.084000
2018-05-23,0.070000
2020-12-29,0.064000
2021-07-22,0.078000
2012-04-19,0.085000
2013-12-20,0.077000
2016-08-22,0.075000
2017-05-22,0.069000
2019-05-23,0.076000
2023-10-20,0.116000
2005-07-20,0.105000
2020-03-23,0.079000
2023-06-21,0.110000
2023-11-21,0.116000
2004-09-22,0.088000
2009-01-21,0.070000
2006-05-22,0.129000
2011-11-21,0.082000
2012-12-20,0.089000
2019-07-23,0.075000
2005-09-21,0.112000
2018-12-27,0.099000
2015-11-19,0.077000
2016-03-22,0.075000
2021-05-20,0.061000
2021-11-22,0.078000
2024-07-23,0.118000
2004-10-21,0.091000
2005-03-22,0.100000
2012-11-20,0.091000
2013-04-19,0.084000
2022-02-17,0.078000
2007-11-20,0.123000
2017-11-21,0.070000
2023-12-21,0.118000
2008-05-13,0.095000
2014-07-22,0.072000
2024-05-23,0.118000
2025-04-15,0.094000
2004-12-21,0.105000
2007-05-22,0.131000
2011-12-28,0.120000
2018-04-20,0.070000
2020-06-22,0.056000
2021-08-23,0.078000
2022-08-23,0.078000
2012-08-22,0.086000
2016-09-21,0.077000
2020-08-21,0.061000
2026-06-15,0.067000
2011-05-20,0.081000
2018-08-23,0.067000
2019-08-22,0.076000
2025-07-15,0.092000
2005-01-20,0.098000
2008-01-22,0.120000
2014-04-21,0.072000
2026-04-15,0.069000
2019-10-23,0.084000
2021-12-22,0.078000
2009-04-21,0.064000
2013-09-19,0.077000
2016-04-20,0.074000
2016-05-20,0.074000
2016-10-20,0.076000
2020-05-21,0.058000
2020-11-20,0.060000
2006-11-20,0.137000
2010-04-21,0.084000
2011-09-21,0.080000
2018-12-21,0.070000
2005-12-21,0.117000
2008-11-19,0.096000
2010-05-19,0.082000
2011-04-19,0.083000
2021-06-22,0.078000
2022-11-22,0.078000
2007-06-20,0.131000
2019-03-20,0.074000
2009-08-20,0.070000
2022-10-21,0.078000
2026-02-17,0.086000
2004-11-22,0.094000
2013-10-22,0.077000
2017-10-23,0.067000
2018-02-20,0.070000
2020-10-22,0.062000
2005-04-21,0.093000
2017-09-21,0.069000
2019-02-20,0.071000
2024-09-20,0.110000
2025-10-15,0.086000
2010-02-17,0.086000
2015-12-29,0.076000
2019-09-20,0.077000
2025-06-16,0.094000
2011-08-22,0.080000
2014-06-19,0.073000
2025-09-15,0.089000
2026-08-14,0.068000
2005-02-17,0.094000
2008-09-19,0.097000
2009-07-22,0.069000
2013-03-19,0.085000
2017-07-20,0.069000
2022-07-21,0.078000
2022-09-22,0.078000
2007-04-19,0.131000
2016-02-18,0.075000
2024-12-23,0.103000
2005-06-21,0.101000
2008-04-21,0.095000
2010-12-29,0.086000
2011-10-20,0.081000
2011-12-21,0.083000
2024-02-21,0.118000
2006-08-22,0.135000
2006-09-20,0.136000
2013-11-20,0.076000
2022-01-21,0.078000
2009-09-21,0.070000
2010-09-21,0.087000
2014-02-19,0.074000
2018-11-21,0.069000
2021-02-18,0.063000
2022-06-22,0.078000
2023-02-21,0.104000
2007-10-22,0.123000
2009-11-19,0.073000
2009-12-22,0.078000
2012-12-27,0.089000
2016-07-20,0.075000
2021-03-23,0.062000
2025-08-15,0.089000