f/overrides/event-backup/fosfx-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

875 B

1DateDividends
21987-01-121.170000
31995-12-080.690000
42000-12-084.980000
52007-12-076.320000
62013-12-060.689000
72025-12-290.085000
82025-11-183.420000
91994-12-090.470000
101997-12-051.680000
112003-12-050.300000
122006-12-015.190000
132011-12-020.847000
142018-12-072.422000
152002-12-060.090000
162004-12-030.300000
172005-12-020.570000
182008-12-050.370000
192024-12-130.866000
201993-12-100.430000
211996-12-062.000000
221998-12-040.710000
232009-12-300.010000
242016-12-160.775000
252019-12-060.697000
262012-12-070.774000
272014-12-050.646000
281986-12-012.140000
291987-12-148.240000
301989-12-141.340000
311992-12-182.470000
322009-12-040.465000
332010-12-030.481000
342014-12-260.025000
352015-12-040.434000
362017-12-080.551000
372022-12-020.390000
382023-12-010.617000
391988-12-150.580000
401990-12-211.540000
411991-12-201.600000
421999-12-033.080000
432020-12-040.313000
442021-12-033.074000