f/overrides/event-backup/ixn-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

855 B

1DateDividends
22004-12-230.105167
32009-12-210.023333
42011-12-190.055667
52017-12-210.135833
62025-06-160.164000
72006-12-210.021500
82008-06-230.035500
92009-06-220.033500
102011-06-210.040833
112013-12-170.076333
122018-12-180.135333
132022-12-130.187000
142024-06-110.160000
152021-12-300.008000
162007-12-240.038833
172008-12-220.037833
182015-12-210.092833
192016-06-210.108667
202018-06-190.091000
212019-12-160.191833
222020-12-140.153667
232025-12-160.929000
242024-12-170.201000
252026-06-150.167000
262005-12-230.004167
272010-12-200.036833
282021-12-130.159000
292017-06-200.102500
302010-06-210.031667
312012-12-170.082500
322013-06-250.065167
332014-06-240.085833
342014-12-190.094833
352015-06-240.089833
362016-12-220.080667
372019-06-170.180500
382022-06-090.175000
392023-12-200.212000
402012-06-200.038500
412020-06-150.160333
422021-06-100.204667
432023-06-070.166000