f/overrides/event-backup/dsi-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

1.5 KiB

1DateDividends
22010-06-240.067000
32012-12-190.160000
42015-03-250.121500
52025-09-160.284000
62010-09-230.094500
72015-06-240.124000
82018-12-170.217500
92022-12-130.297000
102025-06-160.263000
112010-12-220.091000
122009-06-240.066500
132012-03-260.087000
142014-09-240.120500
152026-03-170.310000
162008-09-240.081000
172016-12-210.190500
182019-09-240.214500
192023-09-260.316000
202015-09-250.138500
212009-09-220.064000
222014-06-240.110500
232014-12-240.147500
242016-06-210.131500
252024-12-170.323000
262007-06-280.073000
272007-09-250.074500
282013-09-240.118000
292017-03-240.138500
302026-06-150.282000
312006-12-200.052500
322009-12-230.077500
332013-03-250.093000
342016-09-260.131500
352018-09-260.191000
362023-06-070.188000
372023-12-200.313000
382025-03-180.275000
392008-03-250.077500
402020-03-250.259000
412018-03-220.138000
422010-03-250.059500
432015-12-240.169000
442019-03-200.216000
452021-03-250.222000
462022-03-240.215000
472008-12-230.086500
482013-12-230.125500
492020-06-150.174500
502021-09-240.255000
512009-03-250.081000
522017-09-260.173000
532020-12-140.217000
542011-09-230.087000
552007-12-270.076500
562021-12-130.269000
572024-03-210.247000
582025-12-160.359000
592007-03-230.087500
602012-09-250.108000
612013-06-260.101500
622014-03-250.103500
632018-06-260.211500
642022-06-090.183000
652022-09-260.302000
662023-03-230.263000
672008-06-250.080500
682024-09-250.347000
692024-06-110.216000
702017-06-270.133500
712019-06-170.183500
722019-12-160.228500
732020-09-230.222500
742011-12-220.109500
752011-06-240.080000
762012-06-190.096000
772017-12-190.182500
782021-06-100.172000
792011-03-250.067000