f/overrides/event-backup/cowz-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
22017-09-260.291000
32019-06-250.131000
42021-12-230.278000
52023-03-230.211000
62023-06-220.191000
72023-09-210.300000
82018-06-260.078000
92021-03-220.126000
102025-09-040.309000
112017-03-280.052000
122019-12-240.203000
132021-06-210.106000
142024-09-260.248000
152024-12-270.238000
162026-03-050.200000
172016-12-280.033000
182022-03-240.147000
192022-06-230.213000
202025-06-050.164000
212017-12-270.128000
222020-03-230.283000
232021-09-230.187000
242022-12-220.321000
252024-06-270.300000
262025-03-060.229000
272017-06-270.093000
282018-09-250.121000
292019-03-260.119000
302020-09-210.213000
312023-12-270.298000
322026-06-040.112000
332020-06-220.109000
342025-12-300.617000
352018-03-270.085000
362018-12-240.145000
372020-12-210.247000
382022-09-220.224000
392024-03-210.244000