f/overrides/event-backup/fund-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
2009-03-04,0.090000
2014-03-11,0.100000
2016-09-13,0.090000
2021-03-12,0.104000
1989-12-15,0.135000
2008-09-04,0.120000
1991-07-08,0.025000
2012-03-02,0.100000
2018-03-14,0.129000
2019-03-14,0.120000
2020-09-14,0.107000
1998-03-04,0.132000
2004-12-02,1.420000
2023-09-14,0.124000
2024-06-14,0.130000
2024-12-13,0.216000
2021-12-10,0.411000
2022-03-11,0.136000
2023-06-09,0.122000
1990-12-18,0.205000
2004-03-04,0.100000
2000-12-04,0.340000
2004-06-04,0.155000
2017-09-14,0.100000
1994-06-24,0.062000
2019-06-13,0.116000
2012-12-04,0.170000
2022-12-09,0.128000
2004-09-03,0.110000
2021-09-10,0.125000
2025-09-15,0.127000
1991-01-14,0.055000
2005-03-03,0.120000
2017-06-13,0.100000
2020-06-12,0.109000
2023-12-13,0.127000
1989-06-21,0.160000
2001-12-04,0.140000
2006-03-02,0.120000
2011-03-03,0.090000
2018-09-13,0.129000
1992-07-06,0.140000
2018-06-14,0.129000
2017-03-13,0.100000
2020-03-12,0.116000
2007-03-02,0.130000
2015-06-12,0.110000
2025-03-14,0.131000
2025-06-13,0.128000
2007-09-04,0.130000
2007-12-04,1.618000
2003-12-04,0.620000
2011-06-02,0.100000
2015-05-13,0.110000
2016-06-10,0.090000
1991-12-24,0.085000
2019-12-12,0.116000
2022-06-10,0.139000
2023-03-10,0.125000
2013-06-12,0.090000
1988-12-30,0.200000
2006-12-04,1.200000
2005-09-01,0.120000
2005-12-02,0.850000
2006-06-02,0.120000
2019-09-13,0.112000
1991-08-26,0.172000
2008-03-04,0.130000
2012-06-04,0.100000
2022-09-09,0.133000
2026-03-13,0.134000
1993-01-08,0.125000
2002-12-04,0.090000
2005-06-02,0.120000
2006-09-01,0.130000
2011-12-02,0.110000
1997-01-02,0.042000
2015-12-11,0.120000
1989-10-23,0.180000
1996-01-02,0.028000
1999-12-02,0.133000
1992-04-01,0.150000
2020-12-14,0.215000
2026-06-12,0.142000
2012-09-04,0.090000
2013-03-04,0.100000
2014-09-11,0.110000
2016-12-13,0.120000
1998-12-03,0.132000
2008-06-04,0.120000
2011-09-01,0.110000
2014-12-11,0.110000
1993-04-08,0.122000
2007-06-04,0.130000
2025-12-12,0.191000
2013-09-12,0.100000
2024-03-13,0.129000
2008-12-04,0.100000
2013-12-11,0.110000
2021-06-11,0.116000
1992-10-05,0.135000
2024-09-16,0.130000
2016-03-11,0.100000
2018-12-13,0.302000
2014-06-12,0.100000
2015-09-11,0.100000
2017-12-14,0.220000