f/overrides/event-backup/eniax-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
2024-10-07,0.135000
2026-04-07,0.120000
2017-10-05,0.060000
2008-10-03,0.051000
2009-07-06,0.005000
2016-10-06,0.053000
2017-04-07,0.020000
2018-10-04,0.086000
2020-07-07,0.058000
2008-03-28,0.049000
2014-10-03,0.057000
2016-07-07,0.055000
2024-04-05,0.141000
2025-12-30,0.113000
2020-12-30,0.054000
2022-04-06,0.055000
2023-07-06,0.129000
2019-07-09,0.104000
2025-04-04,0.126000
2007-10-02,0.106000
2022-07-07,0.066000
2022-12-29,0.106000
2021-07-07,0.056000
2009-12-30,0.049000
2016-04-07,0.059000
2025-07-08,0.127000
2019-10-08,0.084000
2024-07-09,0.153000
2008-07-03,0.068000
2015-04-02,0.049000
2018-12-28,0.045000
2007-12-27,0.124000
2021-10-05,0.053000
2021-12-30,0.051000
2025-10-06,0.113000
2014-07-03,0.051000
2018-04-06,0.106000
2024-12-30,0.113000
2015-07-08,0.052000
2017-07-07,0.062000
2020-04-07,0.089000
2009-10-05,0.039000
2023-04-05,0.139000
2026-07-07,0.139000
2019-12-30,0.075000
2020-10-06,0.053000
2023-10-05,0.138000
2023-12-28,0.153000
2015-12-30,0.052000
2017-12-28,0.106000
2018-07-09,0.083000
2008-12-30,0.001000
2019-04-09,0.090000
2021-04-06,0.057000
2022-10-06,0.087000
2014-12-30,0.059000
2015-10-05,0.052000
2016-12-29,0.058000