f/overrides/event-backup/csd-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

395 B

1DateDividends
22021-12-200.455000
32009-12-240.343000
42012-12-240.078000
52017-12-260.315000
62018-12-240.421000
72019-12-230.547000
82023-12-180.332000
92014-12-240.736000
102016-12-230.702000
112025-12-220.158000
122007-12-260.185000
132008-12-240.428000
142010-12-270.107000
152020-12-210.549000
162022-12-190.450000
172024-12-230.137000
182011-12-230.112000
192013-12-240.085000
202015-12-241.002000