f/overrides/event-backup/msoax-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

535 B

1DateDividends
22018-12-042.928000
32020-12-020.238000
42023-12-270.049000
52000-12-190.209000
62009-12-140.130000
72016-12-140.254000
82013-12-200.208000
92015-12-140.218000
102023-12-110.173000
112024-12-090.100000
122005-12-200.021000
132006-12-190.057000
142007-11-211.206000
152011-12-070.187000
162014-12-220.147000
172017-12-190.226000
182019-12-031.492000
191999-12-210.009000
202008-12-110.102000
212010-12-300.003000
222021-12-023.071000
232022-12-121.179000
242025-12-081.478000
252006-12-120.278000
262010-12-130.104000
272012-12-110.176000