f/overrides/event-backup/asmmx-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

435 B

1DateDividends
22014-09-180.002000
32014-12-122.440000
42015-12-111.135000
52016-12-130.999000
62018-12-142.106000
72020-12-151.904000
82006-12-150.066000
92011-12-090.002000
102013-12-130.366000
112025-12-184.249000
122007-12-140.259000
132008-12-120.648000
142010-12-100.002000
152012-12-070.023000
162017-12-130.747000
172021-12-165.457000
182005-12-160.030000
192009-12-110.067000
202019-12-131.865000
212022-12-161.658000
222024-12-160.600000