f/overrides/event-backup/btsmx-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

335 B

1DateDividends
22016-12-080.858000
32012-12-110.110000
42014-12-110.754000
52019-12-100.628000
62013-12-180.949000
72017-12-120.167000
82021-12-140.739000
92022-12-130.854000
102024-12-120.547000
112012-12-310.024000
122020-12-150.148000
132019-03-073.430000
142023-12-120.183000
152025-12-160.504000
162015-12-100.875000
172018-12-110.285000