f/overrides/event-backup/femgx-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
2019-12-16,0.080000
2020-12-15,0.111000
2023-06-20,0.075000
2025-06-20,0.106000
2014-12-15,0.348000
2019-06-17,0.173000
2021-09-15,0.145000
2022-12-20,0.065000
2019-09-16,0.077000
2020-06-15,0.121000
2025-03-20,0.021000
2013-09-16,0.118000
2015-03-16,0.074000
2015-09-15,0.045000
2016-09-15,0.080000
2018-09-17,0.172000
2025-12-22,0.180000
2024-09-20,0.098000
2015-12-15,0.067000
2018-12-17,0.227000
2021-12-15,0.108000
2023-03-20,0.071000
2024-03-20,0.090000
2016-12-15,0.080000
2017-12-15,0.265000
2022-03-21,0.123000
2026-03-20,0.126000
2021-03-15,0.136000
2023-12-20,0.078000
2024-06-20,0.087000
2013-12-16,0.176000
2017-03-15,0.097000
2018-03-15,0.165000
2019-03-15,0.178000
2020-03-16,0.208000
2026-06-22,0.109000
2014-06-16,0.111000
2017-09-15,0.110000
2020-09-15,0.070000
2022-06-21,0.051000
2024-12-20,0.108000
2018-06-15,0.155000
2021-06-15,0.140000
2022-09-20,0.067000
2014-03-17,0.085000
2014-09-15,0.125000
2015-06-15,0.056000
2016-03-15,0.076000
2017-06-15,0.108000
2023-09-20,0.083000
2025-09-22,0.100000