f/overrides/event-backup/esmax-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

495 B

1DateDividends
22007-12-147.036000
32017-12-130.533000
42021-12-160.591000
52023-12-150.735000
62016-12-130.277000
72022-12-161.543000
82024-12-161.387000
92008-12-124.098000
102009-12-110.211000
112011-12-090.793000
122014-12-121.439000
132010-12-100.197000
142012-12-070.639000
152015-12-110.679000
162019-12-130.998000
172003-12-120.033000
182004-12-170.361000
192005-12-161.407000
202006-12-154.246000
212020-12-150.418000
222025-12-184.396000
232000-12-140.045000
242013-12-130.306000
252018-12-140.829000