f/overrides/event-backup/biiex-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

1.3 KiB

1DateDividends
22025-06-300.395000
32014-06-300.196000
42016-06-300.191000
52017-09-290.071000
62018-06-290.229000
72015-03-310.067000
82022-03-310.039000
92022-09-300.101000
102008-12-291.646000
112012-12-060.496000
122013-06-280.279000
132014-09-300.059000
142020-03-310.082000
152021-03-310.112000
162023-09-290.041000
172002-12-160.609000
182007-12-273.741000
192017-03-310.073000
202020-12-310.031000
212004-12-161.012000
222024-12-310.255000
232016-09-300.076000
242019-09-300.148000
252020-06-300.171000
261998-12-171.485000
271999-12-161.827000
282003-12-160.132000
292010-12-310.347000
302023-12-290.119000
312025-12-310.222000
321997-12-170.227000
332013-09-300.069000
342014-12-310.013000
352019-06-280.275000
362018-12-310.120000
372021-12-310.222000
382024-06-280.365000
392005-12-161.706000
402006-12-192.595000
412011-12-060.658000
422015-09-300.091000
432021-06-300.276000
442014-03-310.093000
452019-03-290.109000
462022-12-300.067000
472026-06-300.457000
482015-12-310.069000
492016-12-300.245000
502025-12-100.989000
512023-06-300.347000
522025-09-300.083000
532009-12-300.262000
542018-03-290.011000
552018-09-280.085000
562021-09-300.078000
572001-12-140.963000
582016-03-310.053000
592022-06-300.361000
602017-06-300.177000
612019-12-310.119000
622020-09-300.025000
632000-12-144.673000
642001-12-310.226000
652013-12-310.018000
662015-06-300.155000