f/overrides/event-backup/jsmyx-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
22015-09-300.033000
32016-12-300.217000
42017-06-300.069000
52017-12-290.257000
62018-03-290.069000
72020-03-310.080000
82022-12-300.409000
92015-12-310.250000
102018-09-280.075000
112021-06-300.082000
122015-06-300.084000
132019-03-290.072000
142019-06-280.088000
152019-09-300.099000
162016-09-300.081000
172018-06-290.077000
182018-12-140.632000
192022-12-150.930000
202016-03-310.054000
212017-03-310.065000
222019-12-162.805000
232020-06-300.074000
242021-12-151.948000
252021-12-310.391000
262024-12-310.646000
272014-12-170.275000
282014-12-310.359000
292020-09-300.069000
302020-12-310.204000
312015-03-310.032000
322017-12-150.480000
332020-12-150.489000
342021-03-310.073000
352021-09-300.058000
362023-12-290.498000
372025-12-150.543000
382015-12-180.221000
392016-06-300.072000
402016-12-160.149000
412017-09-290.071000
422018-12-310.344000
432019-12-310.243000
442024-12-160.414000
452025-12-310.665000