f/overrides/event-backup/iqsi-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
22023-12-150.137000
32024-12-200.126000
42019-12-300.016000
52021-12-200.244000
62022-12-160.109000
72025-12-190.244000
82022-06-170.423000
92023-06-160.422000
102020-06-240.106000
112021-03-220.070000
122025-03-210.100000
132025-06-200.501000
142026-06-180.575000
152020-09-240.097000
162023-03-170.159000
172024-03-150.118000
182024-06-210.444000
192020-12-300.150000
202023-09-150.115000
212024-09-200.109000
222021-06-210.365000
232022-09-160.093000
242021-09-200.147000
252022-03-180.092000
262020-03-250.098000
272025-09-190.122000
282026-03-200.091000