f/overrides/event-backup/eipix-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

775 B

1DateDividends
22026-06-240.115000
32020-03-250.130000
42021-06-230.126000
52020-06-240.149000
62021-03-240.151000
72023-03-220.179000
82023-09-200.139000
92024-03-270.161000
102017-06-280.086000
112018-12-190.158000
122020-12-160.140000
132024-09-250.141000
142025-06-250.135000
152017-12-270.026000
162018-06-270.129000
172020-09-230.125000
182022-03-230.128000
192026-03-250.128000
202019-06-260.151000
212019-12-180.133000
222024-06-260.178000
232024-12-181.016000
242025-12-172.251000
252018-09-260.091000
262019-09-250.130000
272022-12-142.910000
282023-06-210.147000
292023-12-130.151000
302025-09-240.138000
312018-03-280.077000
322019-03-270.126000
332022-06-220.255000
342022-09-210.414000
352025-03-260.143000
362021-09-220.136000
372021-12-150.134000
382017-03-290.080000
392017-09-270.081000