f/overrides/event-backup/msft-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

1.8 KiB

1DateDividends
22026-08-200.910000
32017-11-150.420000
42018-08-150.420000
52018-11-140.460000
62012-05-150.200000
72004-11-153.080000
82006-11-140.100000
92010-08-170.130000
102007-05-150.100000
112008-11-180.130000
122009-11-170.130000
132018-02-140.420000
142023-08-160.680000
152004-08-230.080000
162005-05-160.080000
172007-02-130.100000
182024-05-150.750000
192017-08-150.390000
202020-05-200.510000
212022-11-160.680000
222009-08-180.130000
232012-08-140.200000
242016-11-150.390000
252016-02-160.360000
262020-02-190.510000
272021-02-170.560000
282021-05-190.560000
292023-02-150.680000
302006-02-150.090000
312008-05-130.110000
322014-08-190.280000
332014-02-180.280000
342025-05-150.830000
352007-08-140.100000
362007-11-130.110000
372013-02-190.230000
382017-05-160.390000
392019-02-200.460000
402019-05-150.460000
412022-02-160.620000
422025-08-210.830000
432005-02-150.080000
442006-05-150.090000
452016-08-160.360000
462021-11-170.620000
472022-05-180.620000
482026-02-190.910000
492020-08-190.510000
502023-05-170.680000
512003-02-190.080000
522010-02-160.130000
532013-05-140.230000
542014-05-130.280000
552015-08-180.310000
562022-08-170.620000
572024-11-210.830000
582005-11-150.080000
592009-02-170.130000
602010-05-180.130000
612024-08-150.750000
622003-10-150.160000
632018-05-160.420000
642021-08-180.560000
652014-11-180.310000
662015-11-170.360000
672011-11-150.200000
682012-02-140.200000
692012-11-130.230000
702025-02-200.830000
712005-08-150.080000
722008-08-190.110000
732023-11-150.750000
742011-02-150.160000
752015-05-190.310000
762019-11-200.510000
772020-11-180.560000
782025-11-200.910000
792006-08-150.090000
802008-02-190.110000
812010-11-160.160000
822013-08-130.230000
832015-02-170.310000
842016-05-170.360000
852013-11-190.280000
862017-02-140.390000
872019-08-140.460000
882024-02-140.750000
892026-05-210.910000
902009-05-190.130000
912011-05-170.160000
922011-08-160.160000