f/overrides/event-backup/dfas-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

435 B

1DateDividends
22021-06-220.079000
32022-06-220.138000
42024-06-180.167000
52024-09-170.162000
62024-03-190.096000
72021-12-161.512000
82022-09-200.135000
92023-06-210.162000
102023-09-190.159000
112023-03-210.103000
122026-03-240.165000
132024-12-170.178000
142025-03-250.133000
152025-06-240.170000
162025-09-230.188000
172021-09-210.132000
182022-03-220.075000
192022-12-200.178000
202023-12-190.170000
212025-12-160.201000
222026-06-230.240000