f/overrides/event-backup/btirx-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

764 B

1DateDividends
22018-06-222.500000
32021-06-233.459000
42025-12-1520.397000
52019-12-1619.375000
62020-09-230.769000
72020-12-1530.182000
82020-03-240.832000
92021-03-240.700000
102024-06-212.849000
112024-12-1627.751000
122026-03-240.329000
132017-06-235.679000
142017-12-1525.973000
152018-09-211.013000
162021-12-1527.368000
172022-12-1518.848000
182023-09-220.654000
192025-03-240.379000
202018-03-220.813000
212022-09-230.621000
222023-06-231.263000
232024-03-210.513000
242025-06-230.412000
252024-09-230.535000
262019-03-220.824000
272019-06-216.481000
282020-06-237.278000
292022-03-240.622000
302022-06-232.062000
312023-03-240.579000
322023-12-1537.782000
332017-09-220.972000
342018-12-1735.010000
352021-09-230.678000
362025-09-230.431000
372019-09-230.877000
382026-06-236.561000