f/overrides/event-backup/csfax-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

955 B

1DateDividends
22021-06-301.170000
32025-06-300.790000
42006-12-226.794000
52008-06-300.331000
62008-12-190.688000
72013-06-280.454000
82018-06-290.196000
92019-06-281.330000
102017-12-060.441000
112021-12-090.911000
122005-12-230.722000
132007-06-290.663000
142007-09-286.422000
152009-12-171.692000
162012-12-131.163000
172017-06-300.890000
182010-12-161.076000
192016-06-300.690000
202022-12-080.679000
212025-12-080.941000
222004-12-230.610000
232007-12-310.205000
242010-06-300.324000
252012-06-290.378000
262015-01-020.332000
272023-12-070.644000
282013-12-120.363000
292019-12-043.417000
302024-12-040.584000
312005-06-240.640000
322009-06-300.355000
332011-12-150.078000
342026-06-300.766000
352022-06-300.615000
362023-06-300.691000
372006-06-230.775000
382011-06-300.331000
392014-06-300.432000
402015-06-300.412000
412015-12-100.418000
422018-12-060.810000
432014-12-110.279000
442016-12-082.509000
452018-03-200.792000
462020-06-300.652000
472020-12-100.488000
482024-06-280.679000