f/overrides/event-backup/dfstx-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
2011-12-13,0.071000
2024-03-27,0.113000
2024-06-27,0.136000
2009-09-09,0.019000
2008-03-10,0.040000
2008-06-10,0.043000
2012-09-10,0.051000
2015-12-16,1.580000
2018-12-17,1.294000
2022-06-29,0.112000
2023-03-30,0.117000
2005-06-08,0.022000
2025-06-27,0.149000
2024-09-27,0.135000
1998-12-21,1.344000
2006-03-08,0.012000
2020-12-14,0.184000
1992-12-15,0.123000
1995-11-27,0.387000
2004-09-08,0.015000
2006-09-08,0.039000
2007-03-08,0.016000
2007-12-19,1.212000
2009-03-10,0.019000
2010-03-09,0.013000
1993-11-16,0.310000
2025-09-29,0.144000
2012-12-13,1.422000
2011-06-08,0.036000
2016-09-29,0.065000
2006-12-18,1.219000
2011-03-08,0.016000
2020-09-29,0.070000
2021-03-30,0.095000
2022-09-29,0.122000
2025-12-10,0.142000
2004-12-20,0.208000
1994-12-28,0.957000
2003-12-22,0.075000
2008-12-10,0.092000
2009-12-09,0.053000
2012-06-08,0.087000
2013-06-10,0.061000
2014-06-09,0.068000
2015-06-08,0.074000
1994-11-28,0.287000
2019-09-27,0.087000
2014-12-16,1.008000
2020-03-30,0.084000
2022-12-12,1.703000
2023-09-28,0.118000
1999-12-20,1.267000
2007-09-10,0.071000
2009-06-09,0.035000
2012-03-08,0.008000
2013-12-12,1.025000
2016-12-15,0.936000
2018-06-28,0.084000
2019-12-16,0.902000
1997-12-22,1.652000
2023-12-11,0.721000
2013-03-08,0.005000
2013-09-10,0.071000
2017-06-29,0.083000
2018-09-27,0.096000
2023-06-29,0.131000
2010-06-08,0.024000
2005-12-19,1.214000
2006-06-08,0.036000
2010-12-09,0.086000
2017-03-30,0.073000
2017-09-28,0.082000
2026-06-29,0.176000
2000-12-18,1.508000
2014-03-10,0.027000
2019-06-27,0.095000
2008-09-09,0.057000
2001-12-17,1.367000
2002-12-16,0.156000
2004-06-08,0.024000
2014-09-09,0.061000
2019-03-28,0.074000
2021-06-29,0.099000
2021-12-13,2.689000
1993-12-15,0.086000
2024-12-10,0.128000
1996-12-27,1.149000
2005-09-08,0.040000
2010-09-08,0.036000
2011-09-08,0.042000
2016-03-30,0.071000
2018-03-28,0.062000
2021-09-29,0.124000
1995-12-27,0.410000
2025-03-28,0.128000
2022-03-30,0.068000
2007-06-08,0.058000
2015-03-09,0.062000
2015-09-09,0.080000
2016-06-29,0.086000
2017-12-15,1.531000
2020-06-29,0.077000
2026-03-30,0.131000
2005-03-08,0.008000