f/overrides/event-backup/fndc-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

455 B

1DateDividends
22013-12-230.176000
32015-12-210.346000
42016-12-190.555000
52018-12-120.759000
62019-06-260.161000
72025-06-250.194000
82026-06-240.278000
92014-12-220.415000
102017-12-180.696000
112020-06-240.125000
122021-12-080.734000
132023-06-210.237000
142024-12-130.968000
152021-12-300.024000
162025-12-111.524000
172024-06-260.258000
182019-12-120.741000
192020-12-100.490000
202021-06-230.208000
212022-06-220.129000
222022-12-070.489000
232023-12-060.761000