f/overrides/event-backup/himcx-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

935 B

1DateDividends
21997-12-310.100000
32004-06-290.003000
42022-08-265.075000
52023-12-220.128000
62009-12-170.095000
72013-12-200.317000
81999-02-263.260000
91999-12-287.820000
102005-06-220.025000
112007-06-190.007000
122021-12-220.679000
132024-08-230.678000
142011-12-280.131000
152014-08-274.550000
162015-08-194.473000
172019-08-276.147000
182017-08-241.258000
192019-12-230.055000
202020-08-273.034000
212006-06-220.006000
222007-12-170.138000
232008-06-230.013000
242016-12-210.049000
252018-08-233.781000
262020-12-210.624000
272021-08-276.707000
282000-12-280.530000
292011-08-260.054000
302013-08-131.066000
312015-12-220.013000
322000-06-289.810000
332003-12-290.036000
342008-12-160.108000
352009-08-270.007000
362012-12-270.230000
372016-08-253.628000
382014-12-220.299000
392017-12-200.593000
402018-12-210.207000
412023-08-251.854000
422003-06-260.017000
432004-12-150.067000
442005-12-190.097000
452006-12-130.323000
462025-08-255.058000
472025-12-190.240000