f/overrides/event-backup/dbicx-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
2003-12-26,0.040000
2005-10-28,0.620000
2006-12-22,2.111000
2011-12-23,0.082000
2021-12-23,0.019000
2010-12-23,0.109000
2022-03-24,0.018000
2004-12-27,0.035000
2008-12-23,0.177000
2018-12-21,0.506000
2025-12-23,0.031000
2007-12-21,2.841000
2022-12-22,0.268000
2023-06-23,0.045000
2024-06-21,0.010000
2012-12-26,0.105000
2019-12-04,0.194000
2020-12-23,0.007000
2026-06-23,0.018000
2026-03-24,0.019000
2013-12-23,0.068000
2022-06-23,0.021000
2022-09-23,0.031000
2024-09-23,0.046000
2024-12-23,0.064000
2025-03-24,0.008000
2006-04-19,0.800000
2009-12-23,0.032000
2023-09-22,0.045000
2025-06-23,0.017000
2025-09-23,0.045000
2021-03-24,0.006000
2023-03-24,0.092000