f/overrides/event-backup/fca-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
2014-09-23,0.276000
2016-06-22,0.148000
2019-12-13,0.241000
2021-03-25,0.038000
2021-06-24,0.273000
2023-09-22,0.450000
2023-12-22,0.085000
2013-12-18,0.038000
2025-06-26,0.343000
2025-12-12,0.129000
2026-06-25,0.402000
2025-03-27,0.026000
2015-06-24,0.302000
2022-12-23,0.599000
2012-09-21,0.133000
2016-12-21,0.075000
2017-06-22,0.265000
2023-06-27,0.522000
2024-12-13,0.022000
2011-06-21,0.383000
2012-06-21,0.234000
2015-09-23,0.382000
2011-12-21,0.066000
2017-09-21,0.135000
2019-09-25,0.350000
2020-12-24,0.206000
2022-09-23,0.356000
2024-09-26,0.541000
2025-09-25,0.257000
2015-12-23,0.163000
2013-09-20,0.188000
2014-06-24,0.283000
2018-06-21,0.239000
2018-09-14,0.391000
2019-06-14,0.414000
2020-09-24,0.457000
2021-12-23,0.124000
2013-06-21,0.444000
2024-03-21,0.103000
2022-06-24,0.324000
2017-12-21,0.284000
2018-12-18,0.102000
2021-09-23,0.909000
2024-06-27,0.371000
2016-09-21,0.254000
2020-06-25,0.522000