f/overrides/event-backup/mxnzx-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
22016-06-240.070000
32018-06-220.083000
42018-09-070.154000
52023-06-230.104000
62016-12-280.640000
72017-09-060.142000
82018-12-271.000000
92020-12-290.801000
102021-12-290.948000
112023-12-270.862000
122025-12-291.301000
132015-09-040.151000
142016-09-070.034000
152017-12-270.823000
162019-09-060.041000
172021-09-030.188000
182022-12-280.637000
192021-06-230.066000
202022-09-060.153000
212024-09-060.153000
222024-12-270.561000
232025-09-050.239000
242019-12-270.624000
252020-09-040.248000
262015-06-190.052000
272015-12-290.674000
282017-06-230.074000
292019-06-240.078000
302020-06-240.069000
312022-06-230.076000
322023-09-060.098000