f/overrides/event-backup/fncmx-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
2009-12-18,0.150000
2016-01-15,0.044000
2017-12-26,0.659000
2003-12-26,0.020000
2007-12-21,0.680000
2020-12-29,1.086000
2022-12-27,1.159000
2025-12-26,1.517000
2006-01-06,0.040000
2011-12-16,0.268000
2012-12-14,0.466000
2014-01-10,0.026000
2024-12-26,1.482000
2006-12-15,0.280000
2014-12-12,0.749000
2015-12-11,0.963000
2018-12-26,1.660000
2005-01-07,0.060000
2007-01-05,0.070000
2013-12-13,0.889000
2014-12-31,0.035000
2021-12-28,0.924000
2004-12-17,0.380000
2005-12-16,0.170000
2010-12-17,0.225000
2012-12-27,0.009000
2008-12-19,0.200000
2019-12-27,4.967000
2015-12-28,0.022000
2016-12-27,0.672000
2023-12-26,1.266000