f/overrides/event-backup/azbax-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

375 B

1DateDividends
22015-12-170.092000
32017-03-130.007000
42017-12-212.805000
52019-04-110.023000
62019-12-190.011000
72020-12-170.024000
82023-12-200.479000
92024-12-182.476000
102013-12-190.064000
112014-12-110.844000
122016-12-150.006000
132018-12-201.627000
142022-12-210.985000
152013-12-120.116000
162014-12-180.046000
172015-12-100.499000
182021-12-163.427000
192025-12-161.133000