f/overrides/event-backup/mvgnx-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

1015 B

1DateDividends
22014-06-260.055000
32018-09-260.082000
42024-09-260.058000
52015-09-280.063000
62017-09-270.061000
72017-12-210.104000
82018-06-270.083000
92022-09-220.058000
102025-09-250.056000
112015-12-100.042000
122020-09-240.080000
132020-12-170.026000
142021-03-250.063000
152021-12-161.323000
162022-03-240.036000
172023-03-230.048000
182024-06-250.089000
192024-12-121.119000
202025-12-111.707000
212015-06-250.075000
222016-09-270.032000
232018-12-200.431000
242020-06-250.074000
252023-06-220.076000
262016-12-130.048000
272021-06-240.086000
282021-09-230.052000
292022-12-150.397000
302023-12-140.143000
312026-03-260.044000
322017-06-280.046000
332019-12-190.196000
342025-03-250.041000
352014-03-270.043000
362016-03-290.045000
372016-06-280.063000
382018-03-270.030000
392020-03-260.063000
402025-06-260.139000
412026-06-250.095000
422014-09-250.009000
432014-12-110.028000
442015-03-260.044000
452017-03-290.053000
462019-03-270.058000
472019-06-260.088000
482019-09-260.076000
492022-06-230.085000
502023-09-210.043000
512024-03-260.043000