f/overrides/event-backup/mgc-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
22010-12-220.228000
32015-12-170.427000
42019-03-250.481000
52026-06-260.651000
62016-03-210.369000
72016-06-210.368000
82018-03-220.372000
92016-12-200.471000
102017-06-230.403000
112009-09-240.175000
122013-09-230.296000
132014-03-240.276000
142020-12-240.608000
152025-09-290.580000
162008-09-240.155000
172017-03-290.338000
182020-06-250.463000
192016-09-200.422000
202023-06-230.542000
212026-03-270.688000
222010-09-240.220000
232013-03-220.236000
242015-09-210.371000
252015-03-230.314000
262022-06-230.512000
272024-09-260.617000
282025-03-270.599000
292011-09-230.215000
302013-06-240.285000
312014-09-220.315000
322021-03-260.434000
332024-06-270.618000
342010-06-240.191000
352017-09-270.473000
362018-06-280.458000
372021-09-290.511000
382022-09-280.589000
392012-12-200.377000
402015-06-220.357000
412020-09-110.401000
422021-06-240.465000
432023-09-210.572000
442025-06-300.552000
452011-03-250.182000
462018-09-280.481000
472018-12-240.514000
482022-12-220.604000
492023-12-210.674000
502012-03-260.213000
512012-09-240.292000
522022-03-240.475000
532008-03-250.121000
542021-12-270.554000
552012-06-250.223000
562019-12-240.517000
572020-03-260.462000
582023-03-230.501000
592009-03-250.208000
602009-06-240.165000
612010-03-250.160000
622019-06-270.520000
632024-03-210.580000
642008-12-220.206000
652013-12-200.359000
662017-12-260.461000
672019-10-010.505000
682011-12-210.277000
692008-06-240.171000
702009-12-220.285000
712011-06-240.216000
722014-06-230.306000
732024-12-230.628000
742025-12-220.597000