f/overrides/event-backup/mxnyx-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

635 B

1DateDividends
22019-12-300.260000
32020-12-300.149000
42016-12-290.277000
52017-06-270.120000
62019-09-100.551000
72021-12-300.735000
82018-09-110.298000
92022-09-080.540000
102023-06-270.143000
112021-09-070.429000
122024-09-100.262000
132025-12-300.396000
142015-06-240.107000
152015-12-300.259000
162019-03-250.061000
172025-09-090.155000
182019-06-260.121000
192021-06-250.097000
202023-09-080.197000
212023-12-280.258000
222024-12-300.397000
232016-09-090.019000
242018-06-270.130000
252018-12-280.439000
262020-09-080.272000
272022-06-270.131000
282020-06-260.087000
292022-12-290.338000
302016-06-280.115000
312017-09-080.196000
322017-12-280.381000