f/overrides/event-backup/afsm-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
22021-12-230.076000
32022-09-230.059000
42023-06-270.053000
52024-03-210.029000
62024-09-260.017000
72025-03-270.053000
82020-09-240.023000
92020-12-240.060000
102022-12-230.148000
112025-09-250.020000
122026-03-260.041000
132019-12-130.065000
142021-09-230.023000
152023-03-240.042000
162023-12-220.157000
172024-06-270.048000
182024-12-130.083000
192025-06-260.057000
202025-12-120.062000
212020-06-250.035000
222022-03-250.015000
232026-06-250.079000
242022-06-240.068000