f/overrides/event-backup/jnsyx-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

895 B

1DateDividends
22015-03-310.039000
32021-12-151.804000
42022-12-150.661000
52021-12-310.310000
62023-12-290.514000
72015-12-180.193000
82018-03-290.075000
92021-09-300.071000
102019-12-310.212000
112025-12-150.642000
122016-03-310.058000
132017-03-310.068000
142017-12-150.379000
152016-12-160.151000
162016-12-300.191000
172017-06-300.074000
182019-03-290.082000
192019-06-280.100000
202015-09-300.051000
212015-12-310.217000
222016-09-300.077000
232019-09-300.108000
242020-03-310.087000
252014-12-310.325000
262019-12-161.930000
272024-12-310.652000
282022-12-300.421000
292024-12-160.174000
302025-12-310.670000
312018-12-310.297000
322020-09-300.083000
332020-12-310.188000
342017-12-290.224000
352018-12-140.491000
362020-12-150.490000
372017-09-290.070000
382018-06-290.084000
392018-09-280.084000
402020-06-300.082000
412021-03-310.078000
422014-12-170.213000
432015-06-300.083000
442016-06-300.073000
452021-06-300.091000