f/overrides/event-backup/eot-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
2014-09-19,0.086000
2012-03-21,0.093000
2013-04-19,0.086000
2024-11-21,0.068000
2025-01-15,0.068000
2025-08-15,0.068000
2021-10-21,0.063000
2026-06-15,0.068000
2011-04-19,0.103000
2015-08-20,0.086000
2016-02-18,0.086000
2017-09-21,0.086000
2021-05-20,0.064000
2011-01-20,0.103000
2013-01-22,0.089000
2020-08-21,0.064000
2015-06-19,0.086000
2016-04-20,0.086000
2017-12-21,0.086000
2018-10-23,0.086000
2019-12-23,0.072000
2009-12-22,0.103000
2012-02-17,0.093000
2024-01-22,0.063000
2023-07-21,0.063000
2026-07-15,0.068000
2013-12-20,0.086000
2015-07-22,0.086000
2012-06-20,0.091000
2013-02-19,0.089000
2010-09-21,0.103000
2019-11-21,0.076000
2019-12-12,0.078000
2016-12-21,0.086000
2017-11-21,0.086000
2023-09-21,0.063000
2025-09-15,0.068000
2019-08-22,0.076000
2021-03-23,0.064000
2011-12-21,0.097000
2014-02-19,0.086000
2019-04-22,0.081000
2019-06-20,0.081000
2023-05-19,0.063000
2012-04-19,0.091000
2012-10-22,0.089000
2024-12-23,0.068000
2016-10-20,0.086000
2018-05-23,0.086000
2020-05-21,0.064000
2021-11-22,0.063000
2016-11-21,0.086000
2016-12-08,0.207000
2020-12-23,0.064000
2025-12-15,0.068000
2025-07-15,0.068000
2013-05-22,0.086000
2017-10-23,0.086000
2019-10-23,0.076000
2011-08-22,0.097000
2013-10-22,0.086000
2015-04-21,0.086000
2012-07-20,0.089000
2012-09-19,0.089000
2017-03-22,0.086000
2020-07-23,0.064000
2023-10-20,0.063000
2011-07-20,0.097000
2025-03-14,0.068000
2020-04-22,0.058000
2014-12-22,0.086000
2019-09-20,0.076000
2021-01-21,0.064000
2026-03-16,0.068000
2022-08-23,0.063000
2017-02-16,0.086000
2018-08-23,0.086000
2021-09-22,0.063000
2024-10-23,0.068000
2014-06-19,0.086000
2014-11-19,0.086000
2021-12-22,0.063000
2009-08-20,0.103000
2012-12-20,0.089000
2013-11-20,0.086000
2009-09-21,0.103000
2021-07-22,0.063000
2021-08-23,0.063000
2016-09-21,0.086000
2020-03-23,0.064000
2015-01-21,0.086000
2019-01-23,0.086000
2010-05-19,0.103000
2022-04-21,0.063000
2023-06-21,0.063000
2017-08-22,0.086000
2014-03-20,0.086000
2018-12-21,0.086000
2025-05-15,0.068000
2012-01-20,0.093000
2018-04-20,0.086000
2017-06-21,0.086000
2013-07-22,0.086000
2015-02-18,0.086000
2016-07-20,0.086000
2019-05-23,0.081000
2024-02-21,0.063000
2018-12-13,0.107000
2020-09-22,0.064000
2024-04-22,0.063000
2025-06-16,0.068000
2019-03-20,0.081000
2022-10-21,0.063000
2023-02-21,0.063000
2010-06-21,0.103000
2012-11-20,0.089000
2020-01-23,0.072000
2023-01-23,0.063000
2015-11-19,0.086000
2022-02-17,0.063000
2020-02-20,0.072000
2011-05-20,0.103000
2011-09-21,0.097000
2016-01-20,0.086000
2016-03-22,0.086000
2011-03-22,0.103000
2021-04-22,0.064000
2022-12-22,0.063000
2019-02-20,0.081000
2022-09-22,0.063000
2023-12-21,0.063000
2026-04-15,0.068000
2009-11-19,0.103000
2016-06-21,0.086000
2022-07-21,0.063000
2018-06-21,0.086000
2026-01-15,0.068000
2010-04-21,0.103000
2017-05-22,0.086000
2015-03-20,0.086000
2018-03-21,0.086000
2010-03-22,0.103000
2013-06-19,0.086000
2013-03-19,0.089000
2014-04-21,0.086000
2014-07-22,0.086000
2014-08-20,0.086000
2010-11-19,0.103000
2010-12-21,0.228000
2022-01-21,0.063000
2014-05-21,0.086000
2016-08-22,0.086000
2020-06-22,0.064000
2010-01-20,0.103000
2011-11-21,0.097000
2025-02-14,0.068000
2013-08-21,0.086000
2015-12-21,0.086000
2020-10-22,0.064000
2009-10-21,0.103000
2023-04-21,0.063000
2023-08-21,0.063000
2022-03-23,0.063000
2022-06-22,0.063000
2011-10-20,0.097000
2022-11-22,0.063000
2010-02-17,0.103000
2010-07-21,0.103000
2018-11-21,0.086000
2009-12-21,0.078000
2025-11-14,0.068000
2026-02-17,0.068000
2017-04-19,0.086000
2023-11-21,0.063000
2018-02-20,0.086000
2020-11-20,0.064000
2011-06-21,0.097000
2014-01-22,0.086000
2015-05-20,0.086000
2015-09-21,0.086000
2017-01-20,0.086000
2011-02-16,0.103000
2014-10-22,0.086000
2024-08-22,0.068000
2026-08-14,0.068000
2016-05-20,0.086000
2025-04-15,0.068000
2021-06-22,0.063000
2024-05-23,0.063000
2009-07-22,0.103000
2015-12-22,0.005000
2024-06-21,0.063000
2018-09-20,0.086000
2023-03-21,0.063000
2013-09-19,0.086000
2025-10-15,0.068000
2026-05-15,0.068000
2010-10-20,0.103000
2015-10-21,0.086000
2017-12-20,0.122000
2019-07-23,0.081000
2024-09-20,0.068000
2012-08-22,0.089000
2018-07-23,0.086000
2022-05-23,0.063000
2024-07-23,0.068000
2017-07-20,0.086000
2024-03-20,0.063000
2010-08-20,0.103000
2018-01-23,0.086000
2021-02-18,0.064000
2012-05-22,0.091000