f/overrides/event-backup/filfx-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
2011-04-15,0.035000
2016-12-28,0.200000
2007-04-13,0.170000
2008-12-26,0.120000
2010-12-30,0.132000
2019-12-30,0.231000
2020-12-30,0.127000
2008-04-11,0.010000
2012-12-28,0.166000
2014-12-29,0.308000
2022-12-29,0.229000
2013-12-27,0.191000
2017-12-28,0.359000
2021-04-09,0.316000
2021-12-30,0.799000
2023-12-28,0.281000
2024-12-30,0.432000
2025-04-11,0.093000
2009-12-28,0.115000
2015-04-10,0.161000
2018-04-06,0.269000
2024-04-26,0.020000
2008-12-30,0.010000
2014-04-11,0.087000
2019-04-05,0.127000
2016-04-15,0.003000
2018-12-28,0.359000
2022-04-08,0.226000
2006-12-28,0.130000
2007-12-28,0.170000
2011-12-29,0.251000
2012-04-13,0.021000
2026-04-10,0.498000
2015-12-29,0.170000
2020-04-08,0.089000
2025-12-30,0.937000