f/overrides/event-backup/dfqtx-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
2008-09-09,0.046000
2011-12-12,0.056000
2014-06-09,0.063000
2016-09-29,0.062000
2019-12-16,0.574000
2006-03-08,0.015000
2007-09-10,0.043000
2019-09-27,0.089000
2021-09-29,0.108000
2022-06-29,0.107000
2005-12-19,0.047000
2006-12-18,0.049000
2012-09-10,0.048000
2017-03-30,0.068000
2024-06-27,0.118000
2025-03-28,0.116000
2007-06-08,0.043000
2013-09-10,0.057000
2014-12-15,0.210000
2018-06-28,0.080000
2021-06-29,0.093000
2009-12-08,0.028000
2015-03-09,0.054000
2017-09-28,0.079000
2018-03-28,0.033000
2021-12-13,1.279000
2024-03-27,0.108000
2026-03-30,0.122000
2006-11-27,0.038000
2008-03-10,0.031000
2015-09-09,0.070000
2017-06-29,0.075000
2018-12-17,0.337000
2019-03-28,0.079000
2020-06-29,0.089000
2022-12-12,0.889000
2007-12-19,0.017000
2008-12-09,0.037000
2009-03-10,0.027000
2009-09-09,0.028000
2013-12-11,0.233000
2008-06-10,0.042000
2010-09-08,0.039000
2017-12-14,0.322000
2010-06-08,0.028000
2011-09-08,0.038000
2015-12-15,0.424000
2021-03-30,0.085000
2006-06-08,0.031000
2007-11-26,0.043000
2016-12-14,0.213000
2022-03-30,0.098000
2014-03-10,0.042000
2014-09-09,0.064000
2023-09-28,0.112000
2023-03-30,0.105000
2006-09-08,0.030000
2009-10-26,0.016000
2012-06-08,0.052000
2019-06-27,0.088000
2020-09-29,0.083000
2010-03-09,0.019000
2010-12-08,0.059000
2012-03-08,0.021000
2018-09-27,0.088000
2022-09-29,0.109000
2026-06-29,0.139000
2007-03-08,0.025000
2009-06-09,0.031000
2013-03-08,0.030000
2015-06-08,0.069000
2025-06-27,0.124000
2024-12-10,0.101000
2025-12-10,0.104000
2008-10-27,0.031000
2016-03-30,0.077000
2020-12-14,0.089000
2023-06-29,0.112000
2023-12-11,0.237000
2020-03-30,0.089000
2024-09-27,0.116000
2025-09-29,0.123000
2011-03-08,0.021000
2011-06-08,0.035000
2012-12-12,0.192000
2013-06-10,0.055000
2016-06-29,0.072000