f/overrides/event-backup/mxwex-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

615 B

1DateDividends
22020-09-080.477000
32023-12-280.278000
42015-06-240.074000
52018-06-270.080000
62019-12-300.318000
72025-12-300.311000
82016-12-290.377000
92021-06-250.059000
102023-09-080.310000
112024-12-300.418000
122017-09-080.406000
132018-09-110.659000
142021-09-070.689000
152024-09-100.524000
162015-12-300.350000
172022-12-290.300000
182023-06-270.080000
192022-09-080.839000
202017-12-280.595000
212020-06-260.063000
222022-06-270.067000
232018-12-280.790000
242021-12-300.956000
252025-09-090.454000
262019-09-101.139000
272019-06-260.076000
282020-12-300.369000
292016-06-280.074000
302016-09-090.026000
312017-06-270.072000