f/overrides/event-backup/jmyax-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

975 B

1DateDividends
22015-09-300.068000
32016-06-300.134000
42018-03-290.067000
52019-09-300.089000
62021-06-300.157000
72018-09-280.088000
82019-06-280.195000
92019-12-160.054000
102013-09-300.056000
112013-12-180.054000
122013-12-310.143000
132014-09-300.070000
142014-12-170.044000
152019-12-310.201000
162020-09-300.108000
172022-12-300.536000
182025-12-310.962000
192020-06-300.064000
202012-12-310.135000
212013-03-280.061000
222017-06-300.138000
232017-12-290.219000
242019-03-290.062000
252021-03-310.081000
262015-12-310.171000
272016-09-300.075000
282018-06-290.186000
292020-03-310.065000
302020-12-310.161000
312014-03-310.059000
322024-12-310.754000
332014-06-300.144000
342017-03-310.061000
352018-12-140.679000
362018-12-310.193000
372023-12-290.653000
382016-12-300.184000
392017-09-290.090000
402021-09-300.091000
412013-06-280.051000
422015-03-310.059000
432015-06-300.126000
442015-12-180.013000
452016-03-310.061000
462021-12-150.891000
472021-12-310.416000
482012-09-280.115000
492014-12-310.145000