f/overrides/event-backup/eza-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

855 B

1DateDividends
22010-12-211.549000
32015-12-210.843000
42020-06-150.645000
52026-06-151.434000
62011-12-201.066000
72013-06-270.653000
82014-12-170.803000
92004-12-230.604000
102006-12-201.252500
112007-12-201.309000
122009-06-230.987000
132010-06-230.266000
142015-06-250.571000
152017-12-190.617000
162025-12-163.611000
172008-06-251.415500
182011-06-220.857000
192023-06-070.681000
202022-06-090.998000
212023-12-200.506000
222024-12-172.415000
232009-12-221.087000
242012-06-211.030000
252012-12-181.125000
262018-12-181.067000
272019-06-171.315000
282014-06-250.623000
292019-12-164.705000
302021-12-130.458000
312003-12-220.341000
322020-12-141.771000
332021-06-100.491000
342024-06-110.627000
352005-12-230.982500
362008-12-230.921000
372013-12-180.921000
382016-06-221.599000
392018-06-190.857000
402016-12-210.550000
412017-06-200.465000
422022-12-130.657000
432025-06-160.626000