f/overrides/event-backup/crbyx-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

416 B

1DateDividends
22026-06-100.136000
32014-12-094.838000
42015-06-031.641000
52016-12-073.923000
62018-06-120.701000
72019-02-280.014000
82019-06-120.668000
92021-06-100.718000
102017-06-010.565000
112017-12-053.071000
122018-12-111.110000
132019-01-310.016000
142021-12-143.028000
152019-12-121.012000
162022-06-080.475000
172015-12-0910.637000
182016-06-072.054000
192019-03-290.016000
202020-06-100.703000
212020-12-101.502000