f/overrides/event-backup/jtsyx-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
22017-06-300.045000
32018-12-310.384000
42019-03-290.038000
52021-06-300.039000
62021-12-310.618000
72015-03-310.022000
82018-06-290.053000
92018-09-280.050000
102018-12-140.453000
112019-12-310.275000
122024-12-310.542000
132015-06-300.067000
142017-03-310.045000
152020-06-300.032000
162020-09-300.021000
172023-12-290.377000
182015-12-310.257000
192016-09-300.063000
202017-12-150.458000
212019-06-280.049000
222021-03-310.034000
232021-12-153.142000
242014-12-310.368000
252015-12-180.216000
262019-12-161.663000
272022-12-151.550000
282016-06-300.058000
292016-12-160.198000
302017-09-290.049000
312019-09-300.061000
322020-03-310.032000
332020-12-310.293000
342022-12-300.343000
352015-09-300.018000
362017-12-290.272000
372018-03-290.043000
382020-12-150.704000
392021-09-300.011000
402024-12-160.102000
412025-12-310.570000
422014-12-170.262000
432016-03-310.039000
442016-12-300.224000
452025-12-150.795000