f/overrides/event-backup/artsx-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

435 B

1DateDividends
22015-11-192.713000
32016-11-170.329000
42017-11-214.966000
51997-12-102.579000
62004-11-180.532000
72008-12-170.017000
82005-11-220.571000
92007-12-191.852000
102021-11-235.072000
112020-11-242.705000
122024-12-101.832000
131998-09-300.960000
142000-11-150.663000
152019-11-212.646000
162006-12-200.718000
172018-11-205.428000
182022-11-220.078000
192025-12-102.912000
201996-12-031.071000
212001-11-150.057000
222002-11-140.063000