f/overrides/event-backup/emo-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
2015-11-18,1.934378
2017-05-17,1.567091
2019-11-21,1.126347
2025-06-23,0.352595
2025-07-24,0.352595
2012-02-15,1.616063
2016-02-17,1.567091
2017-02-15,1.567091
2022-02-17,0.381978
2022-05-20,0.489716
2024-08-14,0.656219
2016-05-18,1.567091
2025-04-23,0.352595
2025-05-22,0.352595
2026-08-24,0.360000
2011-11-16,1.616063
2014-08-20,1.714006
2014-11-19,1.738492
2025-12-23,0.360000
2018-08-23,1.567091
2018-11-21,1.567091
2020-02-20,1.126347
2020-05-20,0.318315
2026-04-23,0.360000
2017-11-22,1.567091
2018-05-23,1.567091
2023-02-17,0.519099
2024-05-22,0.656219
2026-01-23,0.360000
2012-11-20,1.640548
2015-02-18,1.762977
2019-05-23,1.126347
2020-08-21,0.318315
2026-06-23,0.360000
2015-05-20,1.787463
2021-08-23,0.372184
2021-11-19,0.372184
2022-11-21,0.509305
2025-08-22,0.352595
2025-11-20,0.360000
2013-11-20,1.689520
2019-08-22,1.126347
2020-11-19,0.318315
2022-08-23,0.499510
2024-02-21,0.656219
2026-03-24,0.360000
2012-08-22,1.640548
2013-05-22,1.665034
2016-11-16,1.567091
2019-02-14,1.126347
2025-03-24,0.352595
2011-07-27,1.616063
2014-02-19,1.689520
2014-05-21,1.689520
2021-02-18,0.318315
2024-12-23,0.323213
2025-01-24,0.323213
2012-05-16,1.640548
2015-08-19,1.885406
2024-11-21,0.323213
2026-02-20,0.360000
2026-07-24,0.360000
2013-02-13,1.665034
2023-05-22,0.528893
2023-08-23,0.636631
2025-02-21,0.323213
2025-09-23,0.360000
2025-10-24,0.360000
2013-08-21,1.665034
2016-08-17,1.567091
2018-02-15,1.567091
2021-05-20,0.372184
2023-11-21,0.636631
2024-09-23,0.323213
2024-10-24,0.323213
2026-05-21,0.360000
2017-08-23,1.567091