f/overrides/event-backup/juemx-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
2020-09-28,0.047000
2020-12-18,0.039000
2023-12-20,0.065000
2024-09-26,0.048000
2012-12-18,0.062000
2015-03-27,0.037000
2018-12-19,0.051000
2021-12-20,0.042000
2023-12-13,0.232000
2025-03-27,0.030000
2011-03-31,0.049000
2014-12-19,0.072000
2017-06-28,0.041000
2019-06-26,0.046000
2024-06-26,0.051000
2013-12-12,0.970000
2013-12-20,0.041000
2015-12-11,0.697000
2018-03-27,0.037000
2022-12-20,0.062000
2023-06-28,0.052000
2011-12-20,0.039000
2012-12-13,0.237000
2015-09-28,0.040000
2021-12-13,2.226000
2022-06-28,0.054000
2022-12-13,0.675000
2024-12-12,1.414000
2011-06-30,0.031000
2016-09-28,0.047000
2013-06-28,0.041000
2019-03-27,0.035000
2020-06-26,0.047000
2023-09-27,0.056000
2025-12-11,1.426000
2012-03-30,0.034000
2012-09-28,0.039000
2019-09-26,0.045000
2019-12-19,0.052000
2021-03-29,0.053000
2025-09-26,0.044000
2012-06-29,0.032000
2013-03-28,0.033000
2017-12-13,1.259000
2020-12-11,1.107000
2024-03-26,0.038000
2025-06-26,0.049000
2011-09-30,0.028000
2013-09-30,0.039000
2015-12-21,0.050000
2026-03-27,0.034000
2019-12-12,1.463000
2020-03-27,0.043000
2017-12-20,0.058000
2018-12-12,1.790000
2022-03-29,0.041000
2026-06-26,0.041000
2016-03-29,0.042000
2016-06-28,0.035000
2015-06-26,0.045000
2023-03-29,0.053000
2025-12-18,0.055000
2014-03-31,0.039000
2014-06-30,0.045000
2016-12-20,0.054000
2017-03-29,0.034000
2017-09-27,0.048000
2018-06-27,0.048000
2018-09-26,0.054000
2021-06-28,0.041000
2014-09-30,0.042000
2016-12-14,0.535000
2024-12-19,0.055000
2021-09-28,0.039000
2022-09-28,0.063000
2011-12-15,0.057000
2014-12-12,1.268000