f/overrides/event-backup/mffsx-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

335 B

1DateDividends
22010-12-280.129000
32012-12-270.126000
42016-12-280.571000
52018-12-270.584000
62019-12-260.804000
72023-12-270.703000
82024-12-261.051000
92011-12-270.149000
102015-12-290.436000
112017-12-270.517000
122020-12-290.464000
132025-12-231.833000
142013-12-270.179000
152014-12-290.330000
162021-12-282.111000
172022-12-281.198000