f/overrides/event-backup/mwefx-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

555 B

1DateDividends
21996-12-231.925000
31998-12-170.994000
42025-12-188.620000
52010-12-160.097000
62014-12-160.597000
72017-12-141.165000
82009-12-170.183000
92011-12-150.344000
102016-12-150.493000
111993-12-280.065000
122000-12-181.484000
132007-12-133.382000
142023-12-214.030000
152006-12-143.938000
162013-12-120.451000
172015-12-150.643000
182021-12-093.013000
192024-12-195.753000
202008-12-161.403000
212018-12-132.171000
222019-12-120.977000
232020-12-101.234000
242022-12-084.069000
252012-12-130.345000
261997-12-231.153000
271999-12-171.928000
282005-12-151.167000