f/overrides/event-backup/cnsfx-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
22017-12-130.306000
32020-12-113.184000
42013-06-200.155000
52018-03-220.210000
62016-03-170.171000
72016-09-130.239000
82019-12-131.088000
92014-09-180.144000
102024-06-270.141000
112024-12-120.433000
122022-03-240.063000
132015-12-110.162000
142016-06-160.192000
152022-06-230.061000
162022-12-140.677000
172024-03-280.132000
182025-12-112.401000
192016-12-130.290000
202015-03-190.164000
212015-06-180.164000
222018-06-210.186000
232018-12-142.191000
242020-06-180.119000
252023-03-230.080000
262024-09-260.149000
272025-06-260.184000
282020-03-190.108000
292019-03-210.110000
302020-09-170.120000
312021-09-230.071000
322025-09-250.190000
332019-06-200.110000
342023-09-280.090000
352021-03-250.112000
362013-03-210.145000
372013-12-130.720000
382014-03-200.149000
392014-06-190.143000
402012-12-070.143000
412017-06-150.280000
422017-09-140.280000
432021-12-147.125000
442022-09-220.062000
452025-03-270.174000
462015-09-170.162000
472017-03-160.280000
482018-09-130.150000
492013-09-190.156000
502023-06-220.090000
512023-12-130.090000
522021-06-240.092000
532019-09-190.113000
542026-03-260.157000
552026-06-250.161000
562014-12-120.891000