f/overrides/event-backup/gafax-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

400 B

1DateDividendsctime
22008-12-190.0372017-10-31 13:19:25
32009-12-310.1562017-10-31 13:19:25
42010-12-310.4412017-10-31 13:19:25
52013-12-270.682017-10-31 13:19:25
62014-12-290.2392017-10-31 13:19:25
72014-04-080.3532017-10-31 13:19:25
82009-04-140.012017-10-31 13:19:25
92011-04-120.0622017-10-31 13:19:25
102013-04-090.2482017-10-31 13:19:25
112015-04-080.3762017-10-31 13:19:25