f/overrides/event-backup/iysyx-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
22014-12-111.842000
32024-03-220.070000
42026-06-220.007000
52016-12-080.831000
62023-09-220.005000
72025-06-200.013000
82025-09-220.007000
92025-12-120.276000
102004-12-161.188000
112021-12-163.786000
122024-06-210.008000
132024-09-200.015000
142011-12-081.515000
152017-12-140.429000
162022-12-153.776000
172025-03-210.012000
182015-12-102.154000
192022-09-150.017000
202023-03-220.018000
212026-03-200.009000
222005-12-153.152000
232007-12-130.934000
242019-12-120.121000
252018-12-132.406000
262023-12-150.009000
272006-12-141.342000
282012-12-130.596000
292013-12-122.386000
302023-06-220.018000