f/overrides/event-backup/mbovx-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

455 B

1DateDividends
22011-06-230.038000
32012-06-210.090000
42013-06-200.173000
52014-06-190.150000
62022-12-290.835000
72025-06-130.099000
82013-12-271.373000
92017-12-280.898000
102019-12-270.634000
112018-06-180.094000
122020-06-150.130000
132020-12-290.220000
142021-06-160.001000
152023-12-280.322000
162024-06-130.006000
172024-12-301.712000
182025-12-301.249000
192026-06-150.177000
202018-12-271.099000
212019-06-170.006000
222021-12-290.236000
232023-06-150.218000