f/overrides/event-backup/fnde-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
2017-12-18,0.597000
2017-12-27,0.011000
2018-12-28,0.018000
2023-12-06,1.018000
2024-06-26,0.232000
2025-06-25,0.211000
2013-12-23,0.138000
2016-12-19,0.394000
2019-06-26,0.186000
2020-06-24,0.145000
2021-06-23,0.189000
2021-12-30,0.018000
2026-06-24,0.187000
2024-12-13,1.168000
2025-12-11,1.299000
2014-12-22,0.318000
2015-12-29,0.007000
2019-12-12,0.849000
2020-12-10,0.560000
2021-12-08,1.130000
2022-06-22,0.262000
2015-12-21,0.364000
2018-12-12,0.769000
2022-12-07,1.123000
2023-06-21,0.268000