f/overrides/event-backup/mlvax-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

995 B

1DateDividends
22017-06-280.043000
32023-09-210.041000
42023-12-141.040000
52015-03-260.032000
62016-12-130.078000
72017-03-290.027000
82018-06-270.049000
92022-03-240.029000
102026-03-260.018000
112014-12-110.039000
122017-12-210.254000
132020-03-260.044000
142021-03-250.031000
152022-12-152.116000
162023-03-230.035000
172024-12-122.337000
182016-03-290.030000
192022-06-230.039000
202025-03-250.053000
212025-12-112.584000
222016-06-280.031000
232016-09-270.034000
242019-03-270.037000
252019-06-260.033000
262019-12-190.058000
272020-06-250.046000
282023-06-220.035000
292025-06-260.055000
302026-06-250.035000
312015-06-250.031000
322015-09-280.026000
332015-12-100.111000
342017-09-270.040000
352019-09-260.035000
362021-12-161.040000
372022-09-220.042000
382025-09-250.050000
392014-09-250.032000
402018-12-200.517000
412021-06-240.033000
422021-09-230.025000
432024-09-260.045000
442014-06-260.029000
452018-03-270.025000
462018-09-260.044000
472020-09-240.041000
482020-12-170.063000
492024-03-260.042000
502024-06-250.039000