f/overrides/event-backup/hiasx-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

456 B

1DateDividends
21997-02-280.500000
32015-08-194.361000
42018-08-231.481000
52019-08-274.240000
62025-08-250.079000
71996-09-300.050000
81997-12-315.750000
91999-12-310.290000
102008-12-160.016000
112020-08-273.322000
122021-08-273.386000
132022-08-263.655000
141996-10-310.050000
151996-11-290.040000
161996-12-310.010000
171998-02-272.000000
182000-06-2825.010000
192006-12-130.041000
202016-08-251.683000
211996-08-300.080000
222007-12-170.047000
232009-08-270.002000