f/overrides/event-backup/mxigx-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

555 B

1DateDividends
22005-12-190.130000
32018-09-070.038000
42006-12-180.556000
52013-12-270.589000
62021-12-290.896000
72024-12-270.276000
82025-09-050.067000
92004-12-150.120000
102020-12-290.142000
112009-12-280.124000
122015-12-290.632000
132016-09-070.002000
142017-12-270.485000
152021-09-030.240000
162024-09-060.086000
172008-12-150.332000
182013-09-040.040000
192018-12-271.205000
202019-09-060.010000
212022-09-060.141000
222014-12-290.741000
232003-12-170.010000
242007-12-140.136000
252014-09-030.022000
262016-12-280.027000
272019-12-270.015000
282025-12-290.635000