f/overrides/event-backup/ezm-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

1.6 KiB

1DateDividends
22020-06-230.115000
32022-12-230.236000
42023-06-260.190000
52009-09-210.025667
62013-03-220.040667
72015-06-220.073333
82015-12-210.121333
92017-03-270.115000
102025-06-250.255000
112010-09-200.066667
122011-09-260.047667
132015-03-230.086000
142018-12-240.171000
152021-12-270.146000
162022-09-260.195000
172026-06-250.240000
182009-06-220.028667
192012-09-240.081000
202016-06-200.138333
212016-12-230.162333
222022-06-240.185000
232014-12-190.123000
242018-09-250.156000
252020-12-210.306000
262024-03-220.175000
272008-06-230.042333
282013-06-240.101333
292014-09-220.093667
302019-12-230.179000
312023-03-270.125000
322021-09-240.285000
332024-12-310.007000
342010-03-290.046333
352010-06-280.032333
362011-03-210.028000
372019-03-260.080000
382021-06-240.150000
392016-03-210.072333
402016-09-260.158333
412017-06-260.085000
422025-09-250.230000
432007-06-250.015000
442007-09-240.028667
452011-12-210.069333
462020-09-220.135000
472023-12-220.225000
482007-03-260.018333
492013-12-240.090333
502020-03-240.170000
512017-09-260.105000
522018-06-250.137000
532025-03-260.180000
542008-09-220.047000
552009-12-210.065667
562010-12-220.106667
572012-03-260.038333
582015-09-210.098333
592023-09-250.180000
602024-06-250.190000
612008-03-240.074000
622009-03-230.030333
632012-06-250.081667
642014-03-240.062333
652017-12-260.146000
662011-06-220.033000
672013-09-230.053000
682018-03-200.074000
692024-12-260.208000
702008-12-220.062333
712012-12-240.158000
722014-06-230.078667
732026-03-260.180000
742007-12-170.081667
752019-09-240.180000
762022-03-250.145000
772025-12-260.265000
782019-06-240.125000
792021-03-250.030000
802024-09-250.180000