f/overrides/event-backup/herd-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
22024-09-270.158000
32025-03-070.108000
42020-12-220.162000
52021-09-240.278000
62024-06-280.462000
72025-09-050.187000
82021-03-230.066000
92021-12-270.271000
102023-09-220.368000
112025-06-060.162000
122019-06-260.138000
132020-06-230.074000
142023-06-230.267000
152025-12-311.175000
162019-09-250.164000
172020-03-240.112000
182022-06-240.182000
192023-03-240.109000
202022-12-230.242000
212024-12-300.161000
222022-09-230.243000
232021-06-220.101000
242022-03-250.138000
252024-03-220.138000
262019-12-270.137000
272020-09-220.203000
282023-12-280.212000