f/overrides/event-backup/fxaix-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
2018-04-06,0.491000
2023-12-15,0.702000
2015-04-01,0.326000
2015-04-10,0.271000
2025-04-04,0.597000
2012-07-06,0.288000
2012-10-05,0.282000
2014-10-03,0.330000
2020-07-10,0.498000
2015-07-01,0.450000
2018-07-06,0.449000
2019-07-05,0.480000
2021-07-02,0.496000
2022-10-07,0.581000
2023-04-05,0.538000
2014-04-04,0.298000
2015-10-02,0.366000
2016-04-15,0.384000
2017-12-15,0.478000
2024-10-04,0.642000
2012-04-04,0.186000
2012-12-14,0.345000
2020-12-11,0.586000
2022-12-16,0.636000
2024-04-05,0.553000
2025-07-11,0.654000
2026-07-10,0.695000
2013-10-04,0.309000
2017-04-07,0.495000
2021-04-09,0.413000
2025-10-03,0.672000
2014-12-19,0.556000
2019-10-04,0.502000
2024-12-20,0.723000
2021-10-01,0.527000
2021-12-10,0.583000
2011-10-07,0.223000
2018-10-05,0.451000
2019-12-13,0.751000
2015-12-18,0.617000
2022-04-08,0.462000
2013-12-13,0.344000
2011-12-16,0.256000
2018-12-14,0.875000
2018-12-28,0.106000
2016-12-16,0.834000
2017-10-06,0.451000
2026-04-10,0.668000
2014-07-03,0.334000
2016-07-08,0.369000
2016-10-07,0.388000
2023-10-06,0.559000
2024-07-05,0.625000
2013-07-05,0.279000
2020-04-08,0.542000
2022-07-01,0.577000
2020-10-02,0.456000
2023-07-07,0.602000
2025-12-19,0.725000
2013-04-05,0.271000
2017-07-07,0.419000
2019-04-05,0.574000