f/overrides/event-backup/nmmex-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

315 B

1DateDividends
22020-12-171.521000
32021-12-164.927000
42022-12-150.113000
52016-12-150.305000
62019-12-191.638000
72015-12-170.647000
82011-12-192.603000
92014-12-180.195000
102018-12-200.181000
112024-12-190.119000
122012-12-190.228000
132013-12-190.211000
142025-12-180.375000
152010-12-212.018000
162023-12-210.255000