f/overrides/event-backup/fhkcx-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
2022-12-02,0.343000
2000-12-08,0.560000
2010-12-03,0.401000
2013-12-06,3.685000
2023-12-27,0.021000
2001-12-07,0.160000
2002-07-31,0.001000
2002-10-31,0.001000
2002-12-06,0.190000
2011-12-02,0.626000
1996-12-06,0.220000
1999-12-03,0.170000
2008-12-23,0.068000
2009-12-04,0.065000
2014-12-05,4.566000
2015-12-04,3.933000
2021-12-03,4.679000
2025-12-12,0.954000
2003-12-23,0.038000
2007-12-18,0.167000
2009-12-22,0.139000
2016-12-09,0.321000
2017-12-08,0.142000
2018-12-07,0.246000
2019-12-06,0.259000
2020-12-04,2.698000
2005-12-20,0.088000
2007-12-07,4.530000
2024-12-13,0.541000
1998-12-04,0.320000
2006-12-01,0.200000
1997-12-05,0.050000
1997-12-30,0.010000
2006-12-19,0.162000
2012-12-07,0.430000
2023-12-01,0.594000
2002-06-28,0.001000
2004-12-21,0.033000