f/overrides/event-backup/mggnx-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
22019-03-260.039000
32020-06-240.035000
42021-03-240.058000
52022-12-270.000000
62017-12-200.146000
72018-12-190.182000
82021-12-280.056000
92018-06-260.029000
102021-06-240.033000
112019-09-250.027000
122020-03-250.031000
132020-09-240.036000
142022-03-240.016000
152018-09-250.032000
162019-06-250.025000
172019-12-180.034000
182020-12-230.108000
192021-09-240.029000
202023-12-270.193000
212024-12-230.204000
222017-09-280.051000
232018-03-260.097000