f/overrides/event-backup/mmdex-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

615 B

1DateDividends
22025-12-300.166000
32008-12-310.030000
42022-12-290.021000
52023-12-150.426000
62007-12-310.005000
72008-06-300.012000
82016-12-300.204000
92019-12-300.289000
102010-12-300.058000
112013-12-300.191000
122020-12-300.204000
132019-12-161.533000
142020-12-162.076000
152021-12-151.774000
162022-12-161.675000
172025-12-152.436000
182007-12-200.003000
192012-12-280.056000
202017-12-290.155000
212021-12-300.149000
222024-12-300.236000
232015-12-300.275000
242018-12-140.810000
252023-12-280.328000
262024-12-160.576000
272009-12-310.033000
282011-12-290.071000
292014-12-300.188000
302017-12-280.638000
312018-12-310.307000