f/overrides/event-backup/fmihx-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
2009-10-29,0.133000
2010-10-29,0.108000
2022-12-16,3.091000
2007-12-28,0.278000
2008-10-30,0.066000
2008-12-30,0.049000
2021-12-17,3.361000
2005-10-27,0.398000
2016-12-16,1.475000
2019-12-13,1.536000
2013-12-20,1.422000
2020-12-18,2.255000
2024-12-20,1.921000
2004-12-29,0.047000
2007-10-30,0.285000
2011-10-31,0.460000
2003-10-29,0.153000
2012-12-28,0.074000
2017-12-15,1.994000
2010-12-30,0.029000
2025-12-19,2.112000
2005-12-29,0.003000
2009-12-30,0.038000
2014-12-22,2.231000
2018-12-14,3.510000
2023-12-15,1.575000
2011-12-29,0.135000
2012-10-31,0.335000
2015-12-18,2.050000
2004-10-28,0.224000
2006-10-26,0.362000
2006-12-28,0.066000