f/overrides/event-backup/fku-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
2025-12-12,0.457000
2026-03-26,0.157000
2020-06-25,0.090000
2025-09-25,0.320000
2016-03-23,0.155000
2018-12-18,0.269000
2020-12-24,0.071000
2021-06-24,0.477000
2013-09-20,0.124000
2014-12-23,0.168000
2019-06-14,0.354000
2021-03-25,0.235000
2023-03-24,0.107000
2013-12-18,0.216000
2017-03-23,0.131000
2015-12-23,0.258000
2017-06-22,0.454000
2018-09-14,0.300000
2021-09-23,0.259000
2016-06-22,0.306000
2016-09-21,0.390000
2013-06-21,0.568000
2022-12-23,0.072000
2012-03-21,0.140000
2020-09-24,0.126000
2024-06-27,0.446000
2025-03-27,0.165000
2023-06-27,0.492000
2012-06-21,0.305000
2014-03-25,0.459000
2014-09-23,0.236000
2022-03-25,0.320000
2023-09-22,0.265000
2012-12-21,0.189000
2013-03-21,0.078000
2026-06-25,1.097000
2015-06-24,0.322000
2025-06-26,0.529000
2022-06-24,0.669000
2024-09-26,0.269000
2015-09-23,0.399000
2019-03-21,0.127000
2022-09-23,0.697000
2019-12-13,0.491000
2021-12-23,0.344000
2019-09-25,0.400000
2017-09-21,0.348000
2018-03-22,0.529000
2020-03-26,0.272000
2024-12-13,0.644000
2018-06-21,0.542000
2015-03-25,0.082000
2017-12-21,0.237000
2023-12-22,0.539000
2024-03-21,0.193000
2012-09-21,0.231000
2014-06-24,0.425000