f/overrides/event-backup/iwl-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

1.3 KiB

1DateDividends
22013-03-250.172000
32014-07-020.172000
42016-07-060.297000
52011-07-050.051000
62016-12-220.261000
72023-03-230.361000
82011-03-240.194000
92012-12-190.559000
102015-03-250.277000
112015-12-240.270000
122019-06-170.394000
132013-09-240.180000
142018-07-030.285000
152020-06-150.276000
162025-12-160.438000
172010-09-230.114000
182014-12-240.157000
192018-09-260.278000
202020-09-230.298000
212022-03-240.307000
222013-07-020.184000
232014-09-240.274000
242026-03-170.350000
252009-12-230.155000
262020-03-250.264000
272021-03-250.307000
282011-12-220.176000
292015-09-250.209000
302019-12-160.473000
312022-06-090.273000
322025-06-160.361000
332014-03-250.191000
342015-07-020.249000
352021-09-240.374000
362024-06-110.318000
372010-12-220.145000
382011-09-230.136000
392012-03-230.143000
402013-12-230.229000
412021-12-130.341000
422012-09-240.234000
432017-07-060.277000
442019-03-200.276000
452022-12-130.376000
462017-03-240.248000
472017-12-210.263000
482018-03-220.254000
492026-06-150.392000
502010-03-240.094000
512016-09-260.200000
522018-12-170.310000
532023-12-200.422000
542024-03-210.335000
552019-09-240.326000
562020-12-140.336000
572021-06-100.257000
582023-09-260.415000
592024-09-250.449000
602017-09-260.250000
612022-09-260.425000
622025-03-180.352000
632025-09-160.391000
642010-07-020.121000
652012-06-260.250000
662023-06-070.300000
672024-12-170.406000