f/overrides/event-backup/mcoax-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

2.5 KiB

1DateDividends
22015-06-300.019000
32016-06-300.051000
42002-03-280.069000
52006-12-140.102000
62010-12-200.085000
72023-09-290.048000
82002-06-280.061000
92016-12-130.369000
102021-12-064.697000
112024-03-280.028000
121997-12-191.369000
132003-03-310.054000
142008-03-260.041000
152022-03-310.012000
161996-12-270.821000
172024-09-300.053000
182005-09-300.077000
191998-03-310.137000
202020-03-310.030000
212001-06-290.068000
222014-03-280.018000
232014-06-270.014000
242025-03-310.060000
252004-06-300.035000
262007-03-280.061000
272014-12-081.856000
282020-12-071.521000
292022-09-300.023000
302006-03-280.033000
312026-03-310.035000
322023-06-300.047000
332020-09-300.011000
342021-09-300.012000
352023-12-140.613000
362005-06-300.061000
372025-12-081.538000
382007-12-071.278000
392010-09-290.086000
402011-03-300.066000
412012-03-300.067000
422013-09-270.027000
432015-12-101.184000
441996-06-280.146000
452003-09-300.054000
462017-12-111.107000
472020-06-300.019000
482003-06-300.044000
492001-12-180.080000
502008-09-240.070000
512021-03-310.009000
522001-03-300.124000
532023-03-310.051000
542006-06-270.037000
552012-06-280.071000
562022-12-150.594000
571998-06-300.115000
582002-09-300.061000
592009-06-260.090000
602017-03-310.032000
612018-09-280.036000
622018-12-100.891000
631997-09-300.161000
641996-03-290.120000
651997-03-310.138000
661998-12-220.822000
672006-09-260.044000
682017-06-300.040000
691995-06-300.142000
702019-09-300.023000
712022-06-300.014000
722019-06-280.021000
732007-09-260.068000
742007-12-120.065000
752009-09-250.091000
762010-06-290.081000
772018-03-290.051000
782019-03-290.046000
792024-06-280.046000
802004-12-160.035000
812011-12-130.869000
822016-03-310.056000
832017-09-290.056000
841996-09-300.163000
852001-09-280.092000
862005-12-150.043000
872013-06-270.043000
882013-12-060.694000
892015-09-300.026000
902019-12-090.380000
912025-06-300.062000
921997-06-300.155000
932026-06-300.042000
942002-12-190.057000
952015-03-310.029000
961995-09-290.133000
972004-09-300.040000
982010-03-300.093000
992012-12-050.765000
1002018-06-290.036000
1011999-09-300.132000
1021999-06-300.126000
1031999-12-211.661000
1042000-09-290.164000
1052012-09-270.072000
1062025-09-300.067000
1071995-12-290.129000
1082003-12-180.045000
1091998-09-300.137000
1102008-06-250.058000
1112011-09-290.084000
1122000-06-300.129000
1132009-03-270.127000
1142009-12-160.093000
1152016-09-300.051000
1162021-06-300.014000
1172024-12-160.788000
1181999-03-310.138000
1192000-03-310.124000
1201995-03-310.146000
1212004-03-310.046000
1222008-11-240.026000
1232011-06-290.088000
1242013-03-280.097000
1252014-09-290.016000
1262000-12-192.655000