f/overrides/event-backup/midax-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

495 B

1DateDividends
22005-12-151.780000
32016-12-130.664000
42017-12-120.859000
52025-12-091.010000
62003-12-170.110000
72012-12-110.259000
82013-12-100.300000
92019-12-100.872000
102021-12-071.811000
112020-12-081.395000
122004-12-161.121000
132006-12-142.863000
142007-12-135.494000
152008-12-161.213000
162010-12-090.202000
172011-12-080.235000
182015-12-100.245000
192022-12-061.580000
202023-12-191.207000
211998-12-170.038000
222009-12-100.202000
232014-12-110.307000
242018-12-111.912000
252024-12-102.205000