f/overrides/event-backup/iolzx-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

335 B

1DateDividends
22023-11-301.122000
32023-12-290.193000
42025-11-282.668000
52024-12-310.193000
62004-12-210.499000
72007-12-170.742000
82008-12-150.293000
92019-12-191.002000
102022-11-304.754000
112024-11-292.827000
122025-12-310.268000
132022-12-300.061000
142006-12-180.502000
152009-12-160.216000
162018-12-190.346000
172021-12-315.262000