f/overrides/event-backup/dfusx-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
2013-12-11,0.091000
2020-06-29,0.109000
2022-12-12,1.313000
2025-06-27,0.111000
2000-06-08,0.031000
2002-06-10,0.026000
2017-03-30,0.084000
2001-06-08,0.028000
2009-12-09,0.056000
2003-03-10,0.020000
2004-12-20,0.081000
2009-09-09,0.041000
2000-12-18,0.037000
2008-06-10,0.050000
2009-03-10,0.035000
2009-06-09,0.040000
2003-06-10,0.029000
2005-06-08,0.037000
2011-03-08,0.032000
2016-03-30,0.105000
2017-09-28,0.091000
2026-03-30,0.120000
2001-12-17,0.034000
2012-06-08,0.057000
2014-12-15,0.096000
2020-12-14,0.756000
2015-06-08,0.073000
1999-12-20,0.025000
2004-06-08,0.033000
2025-12-10,0.127000
2024-06-27,0.117000
2005-03-08,0.020000
2011-09-08,0.049000
2020-09-29,0.098000
2008-09-09,0.054000
2014-09-09,0.075000
2016-12-14,0.223000
2007-12-19,0.076000
2014-06-09,0.073000
2018-09-27,0.111000
2019-06-27,0.107000
2014-03-10,0.050000
2004-03-09,0.020000
2010-12-09,0.063000
2011-12-13,0.075000
2019-03-28,0.093000
2021-12-13,1.923000
2022-06-29,0.107000
2024-12-10,0.154000
2012-03-08,0.030000
2026-06-29,0.121000
2016-09-29,0.049000
2020-03-30,0.113000
2021-06-29,0.102000
2021-09-29,0.098000
2023-09-28,0.107000
2025-03-28,0.112000
2006-03-08,0.026000
2012-09-10,0.057000
2012-12-12,0.095000
2023-03-30,0.104000
2023-06-29,0.110000
2005-12-19,0.063000
2022-09-29,0.112000
2002-12-16,0.042000
2011-06-08,0.048000
2025-09-29,0.123000
2004-09-08,0.035000
2006-12-18,0.068000
2007-06-08,0.056000
2015-03-09,0.065000
2015-12-15,0.237000
2002-09-10,0.026000
2007-09-10,0.051000
2008-12-10,0.077000
2010-09-08,0.047000
2019-12-16,0.275000
2000-09-08,0.029000
2007-03-08,0.036000
2010-06-08,0.021000
2013-09-10,0.067000
2018-06-28,0.100000
2003-09-09,0.031000
2017-12-14,0.173000
2005-09-08,0.047000
2006-06-08,0.049000
2013-03-08,0.039000
2018-12-17,0.241000
2023-12-11,0.998000
2001-09-10,0.027000
2002-03-08,0.020000
2018-03-28,0.058000
2015-09-09,0.084000
2017-06-29,0.093000
2003-12-22,0.047000
2019-09-27,0.082000
2022-03-30,0.099000
2026-08-04,0.049000
2013-06-10,0.063000
2001-03-08,0.017000
2006-09-08,0.047000
2008-03-10,0.039000
2024-09-27,0.114000
2000-03-08,0.018000
2016-06-29,0.085000
2021-03-30,0.102000
2024-03-27,0.100000