f/overrides/event-backup/eqnax-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
2013-06-26,0.048000
2014-12-11,0.269000
2015-09-28,0.049000
2021-09-23,0.093000
2022-06-23,0.109000
2019-09-26,0.067000
2020-03-26,0.090000
2021-12-16,1.393000
2013-12-10,0.142000
2019-12-19,0.112000
2021-03-25,0.058000
2026-03-26,0.071000
2016-06-28,0.081000
2017-03-29,0.080000
2023-09-21,0.081000
2024-12-12,1.023000
2023-03-23,0.069000
2018-12-20,0.708000
2014-06-26,0.083000
2016-09-27,0.078000
2017-09-27,0.087000
2020-09-24,0.072000
2022-09-22,0.090000
2023-12-14,0.510000
2022-03-24,0.042000
2012-12-11,0.061000
2014-09-25,0.058000
2016-03-29,0.075000
2018-06-27,0.099000
2018-09-26,0.070000
2021-06-24,0.105000
2013-09-25,0.045000
2025-12-11,2.385000
2026-06-25,0.103000
2014-03-27,0.041000
2024-03-26,0.088000
2025-09-25,0.111000
2015-03-26,0.056000
2022-12-15,0.819000
2013-03-27,0.038000
2020-06-25,0.085000
2025-03-25,0.059000
2016-12-13,0.054000
2017-12-21,0.572000
2019-06-26,0.097000
2024-06-25,0.116000
2024-09-26,0.101000
2025-06-26,0.117000
2015-06-25,0.044000
2015-12-10,0.197000
2018-03-27,0.074000
2019-03-27,0.069000
2020-12-17,0.361000
2023-06-22,0.093000
2017-06-28,0.065000