f/overrides/event-backup/nwxux-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
22017-12-181.236000
32019-09-090.010000
42023-06-120.039000
52024-09-090.112000
62019-06-070.021000
72023-09-110.014000
82023-12-200.190000
92025-12-181.303000
102024-12-190.785000
112018-09-100.011000
122018-12-181.302000
132021-12-211.906000
142022-09-120.022000
152022-12-210.052000
162019-12-180.257000
172020-12-210.105000
182021-09-070.016000
192025-06-090.036000
202026-06-170.077000