f/overrides/event-backup/ibb-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

1.1 KiB

1DateDividends
22015-12-240.010667
32022-09-260.159000
42010-09-240.170000
52017-06-270.059000
62024-09-250.200000
72015-06-240.019333
82016-03-230.051000
92018-09-260.032000
102020-03-250.055000
112021-03-250.131000
122005-12-230.000333
132015-09-250.000667
142018-06-260.156000
152025-12-160.183000
162019-12-160.058000
172008-06-240.059000
182016-09-260.028667
192020-06-150.127000
202020-12-140.065000
212006-12-210.000333
222012-06-220.062000
232017-03-240.099667
242017-09-260.039667
252019-06-170.080000
262021-12-130.041000
272022-03-240.118000
282011-12-220.004667
292014-09-240.018000
302023-06-070.006000
312019-12-300.063000
322021-06-100.023000
332022-12-130.101000
342017-12-210.125000
352023-09-260.153000
362026-06-150.024000
372012-09-240.113333
382014-06-250.131000
392016-06-210.054000
402022-06-090.031000
412023-12-200.124000
422024-03-210.126000
432026-03-170.122000
442007-06-290.029333
452016-12-220.030667
462019-03-200.127000
472023-03-230.065000
482012-03-230.009000
492013-06-270.024000
502019-09-240.071000
512021-09-240.124000
522024-12-170.062000
532012-12-190.034333
542020-09-230.063000
552025-03-180.121000
562025-09-160.083000