f/overrides/event-backup/avuv-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
22021-03-230.258000
32022-12-150.419000
42023-06-200.371000
52020-03-240.104000
62021-09-210.102000
72022-06-210.297000
82023-03-230.318000
92024-06-240.428000
102025-09-230.457000
112020-12-170.289000
122024-03-210.307000
132024-12-170.435000
142020-09-220.156000
152023-09-210.358000
162024-09-230.387000
172025-12-160.381000
182026-03-100.280000
192023-12-180.438000
202019-12-230.207000
212021-12-160.483000
222022-03-220.227000
232025-06-240.435000
242020-06-230.137000
252021-06-220.177000
262022-09-200.353000
272025-03-250.339000
282026-06-090.443000