f/overrides/event-backup/dgsix-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
2010-03-09,0.022000
2015-06-08,0.054000
2021-12-15,0.914000
2022-09-29,0.098000
2025-03-28,0.048000
2007-12-19,0.242000
2009-03-10,0.017000
2010-09-08,0.042000
2014-09-09,0.051000
2017-06-29,0.081000
2023-03-30,0.025000
2004-09-08,0.039000
2005-09-08,0.040000
2006-12-18,0.172000
2013-03-08,0.018000
2024-06-27,0.127000
2024-12-13,1.238000
2005-06-08,0.050000
2007-09-10,0.128000
2013-09-10,0.045000
2014-12-16,0.145000
2021-06-29,0.071000
2013-12-12,0.113000
2009-09-09,0.050000
2017-12-15,0.201000
2018-09-27,0.073000
2020-09-29,0.048000
2021-03-30,0.030000
2021-09-29,0.073000
2022-03-30,0.021000
2023-06-29,0.084000
2004-06-08,0.047000
2012-03-08,0.018000
2012-12-13,0.142000
2015-12-16,0.130000
2019-12-17,0.311000
2020-06-29,0.059000
2026-03-30,0.058000
2004-03-09,0.019000
2004-12-20,0.053000
2008-09-09,0.047000
2011-06-08,0.067000
2011-12-13,0.144000
2018-03-28,0.015000
2019-09-27,0.064000
2023-12-13,0.835000
2008-12-10,0.099000
2010-12-09,0.115000
2016-03-30,0.054000
2025-12-15,1.589000
2012-06-08,0.079000
2017-09-28,0.057000
2025-06-27,0.122000
2005-12-19,0.419000
2007-03-08,0.002000
2008-03-10,0.018000
2010-06-08,0.064000
2018-12-18,0.326000
2020-12-16,0.530000
2023-09-28,0.118000
2008-06-10,0.062000
2012-09-10,0.049000
2014-06-09,0.081000
2006-06-08,0.034000
2006-09-08,0.014000
2009-06-09,0.054000
2015-09-09,0.053000
2016-06-29,0.080000
2019-03-28,0.036000
2020-03-30,0.056000
2006-03-08,0.004000
2009-12-09,0.064000
2013-06-10,0.075000
2016-12-15,0.154000
2022-06-29,0.081000
2022-12-14,0.644000
2024-03-27,0.033000
2005-03-08,0.031000
2011-09-08,0.060000
2014-03-10,0.034000
2015-03-09,0.054000
2016-09-29,0.041000
2017-03-30,0.043000
2026-06-29,0.132000
2007-06-08,0.046000
2011-03-08,0.034000
2018-06-28,0.080000
2019-06-27,0.083000
2024-09-27,0.119000
2025-09-29,0.121000