f/overrides/event-backup/mchi-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

635 B

1DateDividends
22023-06-070.429000
32023-12-200.994000
42024-12-170.891000
52025-06-160.536000
62012-12-180.093000
72021-12-130.477000
82022-12-130.712000
92026-06-150.361000
102011-06-220.954000
112013-12-180.219000
122018-06-190.315000
132020-06-150.237000
142019-12-160.574000
152022-06-090.312000
162025-12-160.735000
172011-12-200.095000
182013-06-270.925000
192015-12-210.631000
202016-12-210.421000
212012-06-210.829000
222016-06-220.303000
232021-06-100.177000
242014-12-170.450000
252024-06-110.191000
262020-12-140.604000
272015-06-250.601000
282017-06-200.192000
292017-12-190.846000
302019-06-170.356000
312014-06-250.728000
322018-12-180.525000