f/overrides/event-backup/dfspx-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
2012-03-08,0.016000
2014-06-09,0.125000
2016-06-29,0.109000
2016-12-15,0.050000
2023-09-28,0.056000
2014-09-09,0.042000
2015-06-08,0.128000
2025-09-29,0.104000
2011-03-08,0.022000
2018-12-18,0.060000
2022-06-29,0.129000
2024-09-27,0.084000
2021-09-29,0.061000
2022-03-30,0.018000
2015-03-09,0.010000
2016-09-29,0.027000
2018-06-28,0.137000
2021-03-30,0.022000
2022-12-14,0.040000
2023-06-29,0.150000
2025-12-15,0.193000
2010-03-09,0.010000
2011-06-08,0.114000
2013-06-10,0.128000
2017-12-15,0.071000
2021-06-29,0.124000
2020-03-30,0.010000
2020-06-29,0.063000
2021-12-15,0.141000
2012-06-08,0.109000
2012-09-10,0.030000
2017-03-30,0.019000
2019-06-27,0.146000
2019-09-27,0.045000
2026-06-29,0.192000
2020-09-29,0.047000
2026-03-30,0.019000
2008-12-10,0.041000
2010-09-08,0.021000
2013-12-12,0.068000
2017-09-28,0.042000
2018-09-27,0.041000
2008-06-10,0.115000
2011-09-08,0.032000
2015-12-16,0.044000
2010-12-09,0.058000
2013-09-10,0.038000
2023-12-13,0.093000
2009-06-09,0.081000
2012-12-13,0.054000
2014-03-10,0.066000
2019-12-17,0.070000
2024-12-13,0.129000
2025-03-28,0.024000
2025-06-27,0.171000
2010-06-08,0.083000
2011-12-13,0.063000
2013-03-08,0.010000
2017-06-29,0.125000
2024-03-27,0.019000
2019-03-28,0.017000
2009-03-10,0.010000
2009-09-09,0.027000
2009-12-09,0.041000
2014-12-16,0.049000
2016-03-30,0.036000
2008-09-09,0.025000
2015-09-09,0.033000
2020-12-16,0.055000
2022-09-29,0.054000
2023-03-30,0.019000
2024-06-27,0.150000