f/overrides/event-backup/iemfx-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

495 B

1DateDividends
22023-12-140.601000
32002-12-180.010000
42008-12-170.500000
52011-12-190.160000
62014-12-170.330000
72015-12-170.180000
82019-12-180.610000
92003-12-170.300000
102007-12-204.800000
112012-12-190.190000
122016-12-190.240000
132017-12-190.220000
142004-12-160.490000
152005-12-150.850000
162021-12-171.329000
172024-12-130.287000
182020-12-170.280000
192022-12-141.234000
202025-12-120.984000
212006-12-212.060000
222009-12-170.160000
232010-12-170.330000
242013-12-180.250000
252018-12-180.393000