f/overrides/event-backup/ngcax-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

516 B

1DateDividends
22014-12-188.901000
32017-12-150.940000
42020-12-153.167000
52004-12-020.210000
62005-12-220.451000
72008-12-180.535000
82009-12-170.220000
92011-12-192.612000
102023-12-150.159000
111998-12-220.062000
122006-12-210.243000
132025-12-150.765000
142024-12-160.367000
151999-04-010.020000
162003-12-040.114000
172012-12-180.528000
182018-12-172.453000
192019-12-160.768000
202013-12-1912.168000
212015-12-181.749000
221997-12-190.061000
232001-12-060.152000
242002-12-050.081000
252007-12-210.495000
262010-12-171.526000