f/overrides/event-backup/emaax-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

375 B

1DateDividends
22009-12-290.066000
32010-04-010.037000
42017-12-270.194000
52021-12-291.075000
62022-12-280.088000
72001-12-200.121000
82003-12-180.148000
92006-12-190.852000
102008-12-290.735000
112019-12-270.275000
122023-12-270.331000
132002-12-190.069000
142004-12-230.392000
152007-12-170.893000
162018-12-270.717000
172025-12-290.587000
182005-12-190.520000
192024-12-270.477000