f/overrides/event-backup/facfx-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
2023-05-12,0.019000
2005-05-06,0.075000
2007-12-28,0.303000
2014-12-29,0.565000
2015-12-29,0.386000
2018-05-11,0.386000
2019-12-30,0.421000
2009-05-15,0.035000
2017-12-28,0.562000
2024-05-10,0.028000
2013-05-03,0.142000
2013-12-27,0.415000
2004-05-07,0.031000
2005-12-29,0.195000
2008-12-26,0.279000
2010-12-30,0.216000
2011-05-06,0.036000
2012-12-28,0.225000
2026-05-15,0.167000
2022-12-29,0.294000
2025-12-30,0.394000
2003-12-26,0.070000
2006-12-28,0.256000
2007-05-04,0.187000
2018-12-28,0.611000
2020-12-30,0.407000
2021-05-14,0.457000
2025-05-09,0.160000
2004-12-29,0.150000
2006-05-05,0.205000
2016-05-13,0.245000
2022-05-13,0.394000
2023-12-28,0.239000
2024-12-30,0.266000
2008-05-09,0.300000
2011-12-29,0.288000
2015-05-08,0.257000
2021-12-30,0.598000
2010-05-07,0.052000
2012-05-04,0.024000
2014-05-02,0.261000
2017-05-12,0.235000
2019-05-10,0.265000
2020-05-08,0.315000
2009-12-28,0.259000
2016-12-28,0.305000