f/overrides/event-backup/eld-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
2011-04-25,0.205000
2011-08-22,0.220000
2013-02-19,0.174000
2018-04-24,0.195000
2019-05-28,0.145000
2022-10-25,0.110000
2018-11-20,0.155000
2021-08-25,0.120000
2021-09-24,0.120000
2022-03-25,0.115000
2023-12-22,0.120000
2024-12-26,0.125000
2012-06-25,0.130000
2015-03-23,0.160000
2015-11-23,0.145000
2016-02-22,0.145000
2017-11-21,0.160000
2019-02-19,0.145000
2024-09-25,0.125000
2025-09-25,0.135000
2011-01-24,0.153000
2012-03-26,0.130000
2014-11-21,0.190000
2016-10-24,0.145000
2018-01-23,0.160000
2020-09-22,0.130000
2023-02-22,0.110000
2013-11-22,0.170000
2014-03-24,0.130000
2014-12-19,0.190000
2016-01-25,0.145000
2021-07-26,0.125000
2026-05-26,0.145000
2017-08-21,0.145000
2013-07-22,0.080000
2015-05-22,0.160000
2015-06-22,0.160000
2016-08-22,0.145000
2016-12-23,0.145000
2017-02-17,0.145000
2017-04-24,0.145000
2018-08-21,0.180000
2020-08-25,0.135000
2026-07-28,0.145000
2011-12-21,0.169000
2015-09-21,0.155000
2015-10-26,0.145000
2023-03-27,0.110000
2012-09-24,0.185000
2012-11-26,0.188000
2013-08-26,0.050000
2020-06-23,0.140000
2025-11-24,0.145000
2010-12-22,0.346000
2012-12-24,0.465000
2014-07-21,0.130000
2017-10-24,0.160000
2021-02-22,0.128000
2023-08-25,0.110000
2025-01-28,0.125000
2017-05-22,0.145000
2022-04-25,0.115000
2012-07-23,0.130000
2015-02-23,0.180000
2016-07-25,0.145000
2020-10-27,0.130000
2022-07-25,0.115000
2010-11-22,0.145000
2011-09-26,0.210000
2018-03-20,0.190000
2018-12-24,0.155000
2021-01-25,0.130000
2023-05-24,0.110000
2013-05-24,0.170000
2015-04-20,0.160000
2016-06-20,0.145000
2019-03-26,0.145000
2020-03-24,0.140000
2021-03-25,0.128000
2024-02-23,0.120000
2020-02-25,0.140000
2024-07-26,0.120000
2026-06-25,0.145000
2013-06-24,0.150000
2016-03-21,0.145000
2019-06-24,0.145000
2022-06-24,0.115000
2022-09-26,0.110000
2025-04-25,0.125000
2011-06-22,0.208000
2011-11-21,0.188000
2013-09-23,0.150000
2015-12-21,0.145000
2020-11-23,0.130000
2023-07-25,0.110000
2023-10-25,0.120000
2025-10-28,0.145000
2013-12-24,0.164000
2014-05-23,0.130000
2017-12-26,0.160000
2018-05-22,0.200000
2019-08-27,0.145000
2018-07-24,0.180000
2020-01-21,0.140000
2022-05-24,0.115000
2025-05-27,0.125000
2010-09-20,0.206000
2016-05-23,0.145000
2019-04-23,0.145000
2020-04-21,0.140000
2024-04-24,0.120000
2026-01-27,0.145000
2011-07-25,0.206000
2019-10-22,0.150000
2019-12-23,0.150000
2026-03-26,0.145000
2014-01-27,0.140000
2015-08-24,0.160000
2018-06-25,0.200000
2020-12-21,0.130000
2022-01-25,0.120000
2025-02-25,0.125000
2012-05-21,0.130000
2012-10-22,0.188000
2018-10-23,0.160000
2026-04-27,0.145000
2023-01-25,0.110000
2012-01-23,0.140000
2014-10-27,0.180000
2016-04-25,0.145000
2017-03-27,0.145000
2017-06-26,0.145000
2022-02-22,0.115000
2022-08-25,0.115000
2023-11-24,0.120000
2026-02-24,0.145000
2019-11-25,0.150000
2020-05-26,0.140000
2021-04-26,0.128000
2023-04-24,0.110000
2025-12-26,0.145000
2010-10-25,0.186000
2016-11-21,0.145000
2021-05-24,0.128000
2024-01-25,0.120000
2024-11-25,0.125000
2011-03-21,0.176000
2012-08-27,0.130000
2013-10-21,0.170000
2024-03-22,0.120000
2014-08-25,0.130000
2014-09-22,0.190000
2016-09-26,0.145000
2017-01-23,0.145000
2019-01-22,0.155000
2019-07-23,0.145000
2021-10-25,0.120000
2024-06-25,0.120000
2025-08-26,0.125000
2011-05-23,0.213000
2013-03-22,0.170000
2015-01-26,0.180000
2021-12-27,0.120000
2025-07-28,0.125000
2014-06-23,0.130000
2017-07-24,0.145000
2018-02-20,0.175000
2019-09-24,0.150000
2024-08-27,0.120000
2025-03-26,0.125000
2025-06-25,0.125000
2012-02-21,0.130000
2014-04-21,0.130000
2021-06-24,0.128000
2022-11-23,0.110000
2024-10-28,0.125000
2011-02-22,0.180000
2013-01-22,0.176000
2017-09-26,0.160000
2021-11-23,0.120000
2023-06-26,0.110000
2011-10-24,0.200000
2012-04-23,0.130000
2013-04-22,0.170000
2014-02-24,0.130000
2018-09-25,0.160000
2020-07-28,0.140000
2022-12-23,0.110000
2024-05-24,0.120000