f/overrides/event-backup/cofyx-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

335 B

1DateDividends
22017-12-111.547000
32019-12-101.614000
42023-12-111.003000
52016-12-130.412000
62018-12-102.221000
72019-01-310.028000
82024-12-103.475000
92019-02-280.027000
102021-12-094.600000
112025-12-092.905000
122022-12-092.641000
132014-12-121.614000
142015-12-141.274000
152019-03-290.030000
162019-04-300.028000
172020-12-092.382000