f/overrides/event-backup/jbysx-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

995 B

1DateDividends
22013-12-310.139000
32014-09-300.077000
42017-06-300.128000
52019-09-300.125000
62024-12-310.814000
72017-03-310.074000
82017-09-290.094000
92020-12-150.414000
102021-09-300.093000
112025-12-310.944000
122014-12-310.136000
132019-12-310.171000
142022-12-300.542000
152012-09-280.112000
162015-12-310.156000
172016-03-310.070000
182016-06-300.123000
192018-03-290.089000
202021-12-150.738000
212013-03-280.057000
222013-09-300.087000
232014-03-310.065000
242015-03-310.061000
252015-12-180.012000
262017-12-290.186000
272020-09-300.109000
282014-06-300.131000
292015-06-300.119000
302015-09-300.080000
312016-09-300.087000
322012-12-310.132000
332013-06-280.064000
342013-12-180.015000
352014-12-170.066000
362016-12-300.167000
372018-09-280.113000
382019-03-290.100000
392020-06-300.099000
402020-12-310.127000
412021-03-310.084000
422021-06-300.134000
432023-12-290.675000
442018-06-290.168000
452018-12-140.549000
462018-12-310.173000
472019-06-280.180000
482019-12-160.080000
492020-03-310.100000
502021-12-310.240000