f/overrides/event-backup/memax-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

595 B

1DateDividends
22006-12-182.832000
32004-12-160.026000
42014-12-160.867000
52022-12-080.278000
61996-12-230.231000
72011-12-150.143000
82015-12-150.033000
92023-12-190.750000
102003-12-170.150000
111998-12-170.093000
122012-12-130.254000
132016-12-150.137000
142019-12-120.582000
151996-06-100.001000
162010-12-160.072000
172020-12-100.204000
182025-12-161.055000
192009-12-170.300000
202013-12-120.121000
212018-12-130.140000
222021-12-090.699000
232007-12-135.652000
242024-12-170.791000
251996-03-290.002000
261997-12-230.245000
272005-12-152.297000
282008-12-163.109000
292017-12-140.030000
301995-12-280.015000