f/overrides/event-backup/fsmax-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
2014-12-19,1.433000
2016-12-16,2.230000
2024-12-20,0.440000
2015-12-18,2.416000
2019-12-13,1.801000
2013-04-12,0.311000
2021-12-10,1.172000
2023-12-15,0.830000
2025-12-19,0.576000
2011-12-16,0.784000
2013-12-13,1.311000
2017-12-15,2.792000
2018-04-11,0.061000
2021-04-09,5.364000
2012-04-13,0.452000
2017-04-12,0.690000
2012-12-14,1.443000
2014-04-11,0.847000
2018-12-14,3.171000
2019-04-12,0.996000
2020-12-11,0.817000
2023-04-14,0.086000
2015-04-10,0.764000
2016-04-15,0.465000
2020-04-08,0.970000
2022-04-08,0.356000
2022-12-16,0.844000