f/overrides/event-backup/mfem-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

755 B

1DateDividends
22023-04-030.110000
32023-12-280.160000
42024-12-310.180000
52025-10-010.220000
62025-12-310.070000
72018-04-020.015000
82019-10-010.075000
92020-10-010.080000
102026-04-010.150000
112021-12-104.537000
122022-04-010.100000
132023-07-030.260000
142024-07-010.210000
152018-10-010.125000
162019-12-300.280000
172021-04-010.030000
182021-10-010.600000
192025-04-010.150000
202018-07-020.120000
212018-12-280.400000
222022-12-120.588000
232020-04-010.070000
242022-07-010.190000
252022-10-030.290000
262021-12-301.570000
272023-10-020.240000
282025-07-010.200000
292017-12-280.054000
302019-04-010.085000
312021-07-010.190000
322024-04-010.140000
332024-10-010.590000
342019-07-010.150000
352020-12-300.200000
362022-12-290.050000
372020-07-010.110000
382026-07-010.190000