f/overrides/event-backup/icmbx-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

1.6 KiB

1DateDividends
22013-06-260.048000
32011-09-270.051000
42014-06-260.030000
52017-06-280.036000
62020-06-300.020000
72005-12-290.043000
82012-09-250.052000
92025-03-310.167000
102005-09-290.046000
112010-12-290.366000
122012-06-190.054000
132013-12-270.667000
142015-06-260.042000
152015-09-280.061000
162023-12-290.008000
172008-12-290.064000
182009-06-260.054000
192016-09-270.043000
202020-03-310.094000
212021-06-300.027000
222023-09-290.109000
232008-06-260.045000
242018-03-290.083000
252019-12-310.355000
262024-06-280.092000
272025-06-300.080000
282026-06-300.066000
292007-12-270.048000
302010-06-280.037000
312011-03-300.029000
322016-03-290.098000
332016-06-280.036000
342021-09-300.041000
352022-03-310.042000
362022-09-300.089000
372006-12-280.185000
382024-09-300.071000
392015-03-270.029000
402018-09-260.049000
412021-03-310.109000
422022-06-300.058000
432007-09-270.054000
442009-09-290.049000
452013-09-250.035000
462017-03-290.002000
472023-03-310.226000
482006-03-300.046000
492010-04-010.041000
502011-12-280.765000
512014-09-260.032000
522016-12-290.392000
532021-12-310.076000
542023-06-300.128000
552005-06-290.020000
562009-12-290.198000
572012-12-270.457000
582014-03-270.024000
592017-09-270.050000
602018-12-280.190000
612006-06-290.051000
622008-09-250.044000
632017-12-270.271000
642018-06-270.031000
652008-03-270.042000
662013-03-270.029000
672014-12-291.186000
682020-09-300.035000
692026-03-310.119000
702010-03-260.039000
712010-09-290.031000
722012-03-280.043000
732019-06-280.046000
742019-09-300.033000
752024-03-280.212000
762006-09-280.048000
772007-06-280.055000
782011-06-300.052000
792020-12-310.035000
802025-09-300.055000
812007-03-280.174000
822019-03-290.125000
832009-03-270.068000