f/overrides/event-backup/eva-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,ctime
2018-05-14,0.625,2019-04-02 14:37:46
2017-05-16,0.555,2019-04-02 14:37:46
2017-11-14,0.615,2019-04-02 14:37:46
2018-11-14,0.635,2019-04-02 14:37:46
2017-02-13,0.535,2019-04-02 14:37:46
2018-08-14,0.63,2019-04-02 14:37:46
2016-11-09,0.53,2019-04-02 14:37:46
2015-11-12,0.4125,2019-04-02 14:37:46
2016-05-12,0.51,2019-04-02 14:37:46
2018-02-14,0.62,2019-04-02 14:37:46
2015-11-13,0.44,2019-04-02 14:37:46
2019-02-14,0.64,2019-04-02 14:37:46
2015-08-12,0.263,2019-04-02 14:37:46
2016-08-11,0.525,2019-04-02 14:37:46
2016-02-12,0.46,2019-04-02 14:37:46
2017-08-11,0.57,2019-04-02 14:37:46