f/overrides/event-backup/fof-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
2016-06-20,0.260000
2023-11-14,0.087000
2008-11-12,0.118000
2014-09-17,0.260000
2019-01-15,0.087000
2019-06-18,0.087000
2017-04-18,0.087000
2018-06-19,0.087000
2020-11-17,0.087000
2021-05-11,0.087000
2012-09-18,0.260000
2018-04-17,0.087000
2018-11-13,0.087000
2023-03-14,0.087000
2024-07-16,0.087000
2014-03-19,0.260000
2015-03-18,0.260000
2021-10-12,0.087000
2022-08-16,0.087000
2021-06-15,0.087000
2025-03-11,0.087000
2025-09-09,0.087000
2007-02-13,0.118000
2007-11-13,0.118000
2012-12-19,0.260000
2015-12-17,0.260000
2024-11-12,0.087000
2016-12-09,0.087000
2018-01-16,0.087000
2021-12-14,0.087000
2023-02-14,0.087000
2011-06-21,0.260000
2011-12-21,0.260000
2014-12-19,0.260000
2024-09-10,0.087000
2006-12-22,0.160000
2007-08-13,0.118000
2008-03-12,0.118000
2008-08-13,0.118000
2019-11-12,0.087000
2019-12-17,0.087000
2025-08-12,0.087000
2008-06-11,0.118000
2016-09-20,0.260000
2017-06-20,0.087000
2018-05-15,0.087000
2010-09-22,0.260000
2017-01-17,0.087000
2024-01-16,0.087000
2008-05-13,0.118000
2010-12-22,0.260000
2022-01-11,0.087000
2022-02-15,0.087000
2022-09-13,0.087000
2007-12-12,0.118000
2012-03-15,0.260000
2019-08-20,0.087000
2020-08-18,0.087000
2018-03-20,0.087000
2021-08-17,0.087000
2025-04-08,0.087000
2007-06-13,0.118000
2007-09-12,0.118000
2008-09-11,0.118000
2013-06-18,0.260000
2022-06-14,0.087000
2023-09-12,0.087000
2025-05-13,0.087000
2025-10-14,0.087000
2009-03-11,0.270000
2014-06-19,0.260000
2017-12-19,0.087000
2021-04-13,0.087000
2026-05-12,0.087000
2020-02-11,0.087000
2021-09-14,0.087000
2007-05-11,0.118000
2016-03-18,0.260000
2017-09-19,0.087000
2017-10-17,0.087000
2009-06-18,0.270000
2017-08-15,0.087000
2023-04-11,0.087000
2010-03-22,0.230000
2018-12-18,0.087000
2019-09-17,0.087000
2025-11-12,0.087000
2024-06-11,0.087000
2024-08-13,0.087000
2013-12-19,0.260000
2022-05-10,0.087000
2024-03-12,0.087000
2024-04-09,0.087000
2024-05-14,0.087000
2025-01-14,0.087000
2025-02-11,0.087000
2026-03-10,0.087000
2007-12-21,0.260000
2008-01-11,0.118000
2012-06-19,0.260000
2023-06-13,0.087000
2016-11-16,0.087000
2018-09-18,0.087000
2019-03-19,0.087000
2019-05-14,0.087000
2020-09-15,0.087000
2026-01-13,0.087000
2017-07-18,0.087000
2018-10-16,0.087000
2020-06-16,0.087000
2020-07-14,0.087000
2018-08-21,0.087000
2019-07-16,0.087000
2020-01-14,0.087000
2020-12-15,0.087000
2008-04-11,0.118000
2015-06-18,0.260000
2017-02-14,0.087000
2018-07-17,0.087000
2023-07-11,0.087000
2023-12-12,0.087000
2026-06-09,0.087000
2017-11-14,0.087000
2019-04-16,0.087000
2022-04-12,0.087000
2022-11-15,0.087000
2022-12-13,0.087000
2023-01-17,0.087000
2024-02-13,0.087000
2024-10-15,0.087000
2008-10-10,0.118000
2009-09-21,0.230000
2017-03-21,0.087000
2021-01-12,0.087000
2025-12-09,0.087000
2026-04-14,0.087000
2020-04-14,0.087000
2007-10-11,0.118000
2013-03-18,0.260000
2013-09-19,0.260000
2015-09-18,0.260000
2018-02-13,0.087000
2020-10-13,0.087000
2022-07-12,0.087000
2023-10-10,0.087000
2007-07-11,0.118000
2008-02-13,0.118000
2010-06-21,0.230000
2017-05-16,0.087000
2026-02-10,0.087000
2008-07-11,0.118000
2022-03-15,0.087000
2022-10-11,0.087000
2025-07-15,0.087000
2021-07-13,0.087000
2026-07-14,0.087000
2007-04-11,0.118000
2008-12-11,0.118000
2011-09-20,0.260000
2019-10-15,0.087000
2025-06-10,0.087000
2020-03-17,0.087000
2021-03-16,0.087000
2021-11-16,0.087000
2023-05-09,0.087000
2021-02-09,0.087000
2023-08-15,0.087000
2024-12-10,0.087000
2026-08-11,0.087000
2009-12-21,0.230000
2011-03-22,0.260000
2016-10-18,0.087000
2019-02-12,0.087000
2007-01-11,0.117000
2007-03-13,0.118000
2020-05-12,0.087000