f/overrides/event-backup/dccax-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
2005-12-22,0.230000
2008-12-22,0.008000
2010-12-22,0.044000
2016-12-22,0.239000
2017-12-22,1.922000
2018-12-21,1.992000
2000-12-22,0.153000
2001-12-21,0.108000
2004-12-22,0.025000
2007-12-21,0.492000
2021-12-17,1.925000
2022-12-16,0.905000
2023-12-18,0.839000
2006-12-21,0.420000
2014-12-22,1.078000
2019-12-19,0.423000
2023-12-29,0.099000
1999-12-22,0.135000
2002-12-20,0.075000
2003-12-22,0.044000
2012-12-21,0.011000
2013-12-20,0.498000
2015-12-22,0.590000
2020-12-18,0.185000
2024-12-16,0.297000
2025-12-15,1.289000