f/overrides/event-backup/imtm-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

495 B

1DateDividends
22021-06-100.312000
32022-06-090.474000
42022-12-130.353000
52024-06-110.516000
62015-06-250.299000
72016-06-220.335000
82016-12-210.347000
92019-12-160.205000
102023-06-070.431000
112024-12-170.581000
122018-06-190.381000
132018-12-180.223000
142019-06-170.459000
152020-06-150.224000
162021-12-300.086000
172023-12-200.354000
182025-06-160.534000
192026-06-150.602000
202015-12-210.096000
212017-06-200.345000
222017-12-190.239000
232020-12-140.141000
242021-12-131.661000
252025-12-161.721000