f/overrides/event-backup/iscax-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

475 B

1DateDividends
22010-04-300.005000
32011-12-280.283000
42015-12-294.106000
52005-12-270.167000
62007-12-276.218000
72022-12-280.259000
82025-12-293.569000
91998-12-290.285000
102014-12-294.048000
112017-12-272.605000
122018-12-274.360000
132023-12-270.306000
142002-10-210.059000
152013-12-275.393000
162002-07-190.059000
172015-12-310.156000
182016-12-280.291000
192019-12-271.723000
202020-12-292.537000
212021-12-293.348000
221999-12-203.613000
232002-06-190.058000
242024-12-270.676000