f/overrides/event-backup/extgx-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

475 B

1DateDividends
22011-12-280.111000
32013-12-190.138000
42016-12-150.172000
52020-12-210.162000
62022-12-200.156000
72007-12-240.129000
82010-12-290.092000
92009-12-300.119000
102014-12-220.157000
112017-12-140.172000
122025-12-181.272000
132006-12-270.103000
142008-12-300.153000
152012-12-200.152000
162019-12-190.193000
172003-12-260.013000
182004-12-270.052000
192018-12-190.162000
202021-12-210.069000
212023-12-280.188000
222024-12-190.799000
232005-12-210.069000
242015-12-170.165000