f/overrides/event-backup/dvipx-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
2011-06-15,0.060000
2014-12-02,0.319000
2016-03-15,0.050000
2018-06-15,0.471000
2018-12-06,0.202000
2020-12-28,0.083000
2025-12-04,0.798000
2012-12-14,0.245000
2014-06-13,0.450000
2017-03-15,0.068000
2019-09-16,0.089000
2022-03-15,0.055000
2023-09-15,0.075000
2020-06-15,0.058000
2016-06-15,0.080000
2018-09-17,0.106000
2019-06-14,0.109000
2019-12-05,0.308000
2020-03-16,0.091000
2014-03-14,0.085000
2015-06-15,0.485000
2017-12-27,0.082000
2024-12-26,0.102000
2016-12-28,0.080000
2017-09-15,0.083000
2017-12-04,0.292000
2023-12-26,0.077000
2018-12-27,0.095000
2021-03-15,0.061000
2022-12-05,0.109000
2025-12-26,0.112000
2013-12-31,0.009000
2015-12-02,0.288000
2016-09-15,0.080000
2020-09-15,0.072000
2021-12-28,0.103000
2022-09-15,0.079000
2015-09-15,0.080000
2017-06-15,0.292000
2021-06-15,0.291000
2021-12-03,0.363000
2023-03-15,0.089000
2023-06-15,0.060000
2024-12-04,0.842000
2026-06-15,0.419000
2012-09-14,0.063000
2013-09-13,0.069000
2025-06-16,0.257000
2013-06-14,0.260000
2013-12-13,0.383000
2014-09-15,0.070000
2024-03-15,0.076000
2024-09-16,0.076000
2026-03-16,0.071000
2015-03-13,0.038000
2016-12-02,0.059000
2018-03-15,0.062000
2021-09-15,0.080000
2024-06-14,0.456000
2015-12-29,0.082000
2025-03-14,0.077000
2011-09-15,0.064000
2022-12-27,0.123000
2012-03-15,0.050000
2012-12-31,0.003000
2019-03-15,0.078000
2020-06-26,0.448000
2022-06-15,0.572000
2011-12-15,0.070000
2012-06-15,0.066000
2013-03-15,0.051000
2014-12-29,0.077000
2019-12-27,0.094000
2025-09-15,0.078000