f/overrides/event-backup/altl-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

475 B

1DateDividends
22026-06-040.035000
32020-12-210.150000
42023-06-220.108000
52024-06-270.175000
62025-09-040.048000
72025-12-300.288000
82021-12-230.093000
92023-03-230.080000
102023-12-270.178000
112025-03-060.003000
122023-09-210.064000
132024-09-260.141000
142025-06-050.068000
152021-03-220.175000
162021-06-210.081000
172022-03-240.117000
182022-09-220.084000
192022-12-220.170000
202021-09-230.137000
212022-06-230.127000
222024-03-210.067000
232024-12-270.196000
242026-03-050.067000