f/overrides/event-backup/mstzx-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

1.2 KiB

1DateDividends
22014-12-170.245000
32024-07-310.033000
42025-12-120.020000
52012-12-190.361000
62013-12-180.232000
72017-12-180.268000
82023-02-280.029000
92025-04-300.033000
102024-11-290.030000
112024-05-310.032000
122025-01-310.032000
132025-10-310.034000
142022-11-300.028000
152023-01-310.028000
162023-10-310.028000
172023-12-290.026000
182024-01-310.029000
192024-12-310.033000
202016-12-190.250000
212023-07-310.028000
222023-09-290.027000
232024-04-300.034000
242019-12-130.347000
252023-03-310.028000
262025-12-310.036000
272026-02-270.031000
282026-03-310.033000
292026-05-290.031000
302026-06-300.035000
312024-09-300.033000
322011-12-190.435000
332025-03-310.032000
342021-12-080.199000
352022-12-300.023000
362024-03-280.025000
372024-06-280.029000
382023-08-310.028000
392025-05-300.031000
402025-11-280.030000
412020-12-110.450000
422023-05-310.029000
432026-01-300.033000
442026-04-300.033000
452015-12-170.270000
462018-12-140.392000
472022-04-290.023000
482022-10-310.030000
492025-02-280.029000
502024-02-290.027000
512024-10-310.035000
522025-06-300.035000
532025-09-300.036000
542026-07-310.032000
552023-04-280.024000
562023-06-300.027000
572023-11-300.027000
582024-08-300.029000
592025-07-310.034000
602025-08-290.032000