f/overrides/event-backup/mfus-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

715 B

1DateDividends
22020-10-010.030000
32020-12-300.180000
42022-10-030.200000
52023-10-020.210000
62024-04-010.160000
72025-12-310.220000
82021-10-010.150000
92022-07-010.180000
102024-07-010.160000
112018-04-020.021000
122019-07-010.130000
132020-04-010.170000
142023-04-030.210000
152018-07-020.136000
162019-10-010.050000
172022-04-010.180000
182024-10-010.171000
192020-07-010.200000
202024-12-310.230000
212026-04-010.250000
222026-07-010.220000
232025-07-010.210000
242025-10-010.210000
252017-12-280.279000
262018-12-280.265000
272019-04-010.110000
282021-04-010.130000
292023-12-280.200000
302025-04-010.230000
312022-12-290.230000
322018-10-010.080000
332019-12-300.300000
342021-07-010.130000
352021-12-300.150000
362023-07-030.200000