f/overrides/event-backup/dgs-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
2011-12-21,0.221000
2024-12-26,0.310000
2010-09-20,0.452000
2014-06-23,0.453000
2018-12-24,0.308000
2024-03-22,0.050000
2025-03-26,0.075000
2025-06-25,0.525000
2018-06-25,0.639000
2009-09-21,0.382000
2012-03-26,0.069000
2023-03-27,0.115000
2022-12-23,0.314000
2024-09-25,0.605000
2008-12-22,1.222000
2012-12-24,0.190000
2013-06-24,0.805000
2015-09-21,0.661000
2016-06-20,0.420000
2019-03-26,0.100000
2019-12-23,0.382000
2023-09-25,0.780000
2026-03-26,0.200000
2009-03-23,0.098000
2009-12-21,0.412000
2014-09-22,0.583000
2025-12-26,0.579000
2017-09-26,0.675000
2019-06-24,0.655000
2022-03-25,0.140000
2022-09-26,0.825000
2020-09-22,0.630000
2015-12-21,0.112000
2010-06-28,0.549000
2016-12-23,0.244000
2020-06-23,0.580000
2014-03-24,0.091000
2014-12-19,0.252000
2015-06-22,0.377000
2021-03-25,0.109000
2023-06-26,0.920000
2025-09-25,0.795000
2010-12-22,0.289000
2011-09-26,0.682000
2012-06-25,0.476000
2013-12-24,0.253000
2023-12-22,0.455000
2017-12-26,0.229000
2019-09-24,0.750000
2009-06-22,0.332000
2011-03-21,0.105000
2011-06-22,0.685000
2013-03-22,0.069000
2013-09-23,0.464000
2017-06-26,0.560000
2021-06-24,0.755000
2026-06-25,0.840000
2021-09-24,0.650000
2022-06-24,1.070000
2024-06-25,0.680000
2021-12-27,0.590000
2007-12-17,0.048000
2012-09-24,0.723000
2016-09-26,0.675000
2018-09-25,0.831000
2020-03-24,0.063000
2020-12-21,0.488000