f/overrides/event-backup/ewus-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

575 B

1DateDividends
22016-06-220.524000
32018-06-190.682000
42022-12-130.192000
52023-12-200.638000
62013-12-180.283000
72014-12-170.866000
82019-06-170.548000
92022-06-090.437000
102021-12-300.052000
112019-12-160.603000
122023-06-070.363000
132025-06-160.679000
142025-12-160.824000
152012-06-210.316000
162014-06-250.381000
172017-06-200.474000
182021-06-100.230000
192016-12-210.554000
202024-06-110.425000
212024-12-170.848000
222026-06-150.537000
232015-06-250.517000
242018-12-180.508000
252020-06-150.420000
262021-12-131.340000
272015-12-210.610000
282017-12-190.664000
292020-12-140.410000