f/overrides/event-backup/amcpx-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

1.4 KiB

1DateDividends
21999-12-091.725000
32006-12-210.569000
41986-03-140.190000
51988-12-160.190000
61991-12-030.120000
71997-11-281.490000
82000-12-071.315000
92013-06-140.527000
102021-12-151.171000
112023-06-140.093000
122025-06-111.868000
131996-11-290.900000
142002-12-050.024000
151987-03-200.180000
161994-11-180.080000
171996-05-170.050000
182016-12-190.520000
192017-12-181.263000
202020-12-160.934000
212025-12-122.151000
221992-11-200.110000
232003-06-200.003000
242008-06-200.704000
252009-06-190.164000
262004-12-020.169000
272014-06-130.916000
282017-06-160.429000
292023-12-131.150000
301998-06-190.480000
312002-06-210.096000
322005-12-210.255000
332019-12-191.467000
341987-12-210.120000
351989-12-150.240000
361995-12-010.120000
371999-06-180.850000
382011-06-170.072000
392016-06-170.517000
402018-06-150.853000
412026-06-163.537000
421992-05-220.040000
431994-05-200.050000
442010-06-180.080000
452018-12-202.186000
462019-06-140.177000
471989-03-170.030000
481993-05-210.050000
491995-05-120.050000
502014-12-221.696000
512015-06-190.960000
522021-06-161.529000
532001-06-220.565000
542013-12-201.703000
552020-06-170.582000
562022-06-152.267000
571998-12-101.940000
582001-12-060.225000
592007-12-141.218000
601993-11-190.070000
612015-12-181.339000
621990-03-160.050000
631997-05-231.080000
642000-06-231.046000
652007-06-150.136000
662024-06-120.811000
671988-03-180.100000
681990-12-040.200000
691991-03-150.030000
702005-06-170.222000
712006-06-160.167000
722012-06-150.084000
732024-12-172.687000