f/overrides/event-backup/fcnkx-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
2009-12-18,0.026600
2011-02-04,0.008500
2014-02-07,0.097000
2022-12-09,1.231000
2021-02-12,0.400000
2024-12-06,0.880000
2025-02-07,0.175000
2009-02-13,0.001500
2012-12-14,0.093100
2015-12-11,0.441500
2018-12-07,0.821000
2020-12-11,1.246000
2010-02-05,0.009000
2015-02-06,0.095000
2021-12-10,1.625000
2023-02-10,0.186000
2025-12-05,1.090000
2017-12-08,0.698300
2019-02-08,0.106000
2019-12-13,0.464000
2008-12-26,0.028200
2018-02-09,0.185800
2026-02-06,0.042000
2010-12-17,0.039400
2016-12-09,0.321600
2017-02-10,0.067600
2022-02-04,0.215000
2023-12-08,0.510000
2011-12-28,0.000400
2020-02-07,0.097000
2024-02-16,0.024000
2011-12-16,0.019400
2013-02-08,0.074500
2013-12-13,0.681400
2014-12-12,0.627600
2016-02-05,0.063700