f/overrides/event-backup/ixus-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

595 B

1DateDividends
22013-12-180.322000
32022-12-130.490000
42023-12-201.048000
52012-12-180.172000
62025-12-161.570000
72018-06-190.891000
82019-06-170.937000
92021-06-100.852000
102025-06-161.171000
112014-12-170.607000
122024-12-171.182000
132021-12-300.086000
142023-06-070.982000
152013-06-270.875000
162014-06-250.965000
172016-12-210.547000
182020-12-140.707000
192015-06-250.815000
202016-06-220.754000
212017-06-200.739000
222022-06-090.948000
232019-12-160.977000
242021-12-131.273000
252024-06-111.019000
262026-06-151.233000
272015-12-210.574000
282017-12-190.778000
292018-12-180.686000
302020-06-150.535000