f/overrides/event-backup/istfx-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

3.2 KiB

1DateDividends
22024-08-300.037000
32016-06-300.015000
42017-01-310.012000
52020-11-300.016000
62021-09-300.012000
72023-09-290.034000
82023-10-310.034000
92024-01-310.036000
102026-02-270.027000
112014-12-310.035000
122018-08-310.019000
132021-03-310.014000
142021-12-310.011000
152022-12-300.024000
162023-02-280.026000
172025-01-310.033000
182014-10-310.014000
192019-07-310.022000
202019-08-300.022000
212022-09-300.021000
222022-10-310.021000
232023-03-310.028000
242013-10-310.014000
252014-07-310.014000
262019-11-290.022000
272024-09-300.035000
282013-01-310.017000
292013-04-300.013000
302014-09-300.014000
312017-12-290.036000
322019-09-300.022000
332021-04-300.013000
342021-10-290.011000
352014-02-280.014000
362018-07-310.019000
372020-02-280.020000
382021-08-310.012000
392023-12-290.036000
402025-03-310.033000
412024-12-310.033000
422014-03-310.014000
432015-11-300.015000
442016-04-290.014000
452016-05-310.015000
462020-04-300.021000
472020-05-290.019000
482020-12-310.014000
492016-09-300.015000
502017-11-300.017000
512018-06-290.017000
522018-12-310.031000
532019-05-310.022000
542024-04-300.037000
552025-06-300.032000
562026-01-300.029000
572017-07-310.012000
582018-04-300.017000
592019-03-290.023000
602023-01-310.025000
612022-11-300.024000
622012-10-310.017000
632012-11-300.017000
642013-03-280.013000
652014-11-280.014000
662016-03-310.014000
672017-05-310.012000
682021-01-290.014000
692025-11-280.032000
702025-12-310.032000
712013-06-280.013000
722013-08-300.014000
732014-06-300.014000
742015-07-310.015000
752017-08-310.015000
762014-08-290.014000
772016-12-300.015000
782019-10-310.022000
792022-01-310.011000
802022-02-280.011000
812023-08-310.030000
822024-07-310.037000
832013-12-310.016000
842018-01-310.016000
852019-04-300.022000
862023-11-300.036000
872026-07-310.028000
882014-04-300.014000
892016-07-290.015000
902018-11-300.024000
912020-08-310.016000
922020-10-300.015000
932025-10-310.032000
942018-03-290.018000
952018-09-280.019000
962020-01-310.021000
972025-04-300.033000
982026-04-300.028000
992013-02-280.015000
1002013-07-310.014000
1012015-12-310.033000
1022020-07-310.019000
1032021-05-280.013000
1042023-07-310.030000
1052025-09-300.032000
1062013-11-290.014000
1072015-04-300.015000
1082019-12-310.022000
1092020-03-310.021000
1102020-06-300.019000
1112021-07-300.012000
1122012-12-310.020000
1132025-05-300.032000
1142026-05-290.028000
1152026-06-300.028000
1162016-11-300.015000
1172023-06-300.028000
1182015-05-290.015000
1192026-03-310.028000
1202015-01-300.014000
1212016-08-310.015000
1222017-06-300.012000
1232024-02-290.036000
1242024-11-290.033000
1252013-09-300.014000
1262017-03-310.012000
1272017-09-290.015000
1282018-10-310.019000
1292019-06-280.022000
1302022-04-290.011000
1312022-05-310.014000
1322015-02-270.014000
1332015-10-300.015000
1342023-05-310.028000
1352024-05-310.037000
1362018-05-310.017000
1372024-03-280.036000
1382013-05-310.013000
1392015-09-300.015000
1402016-10-310.015000
1412019-02-280.023000
1422022-06-300.017000
1432022-07-290.018000
1442023-04-280.028000
1452024-10-310.033000
1462016-01-290.014000
1472017-04-280.011000
1482018-02-280.017000
1492019-01-310.025000
1502014-05-300.014000
1512021-06-300.013000
1522022-08-310.019000
1532025-02-280.033000
1542025-08-290.032000
1552015-06-300.015000
1562016-02-290.014000
1572017-02-280.012000
1582021-11-300.011000
1592022-03-310.011000
1602024-06-280.037000
1612014-01-310.014000
1622015-03-310.015000
1632015-08-310.015000
1642017-10-310.017000
1652020-09-300.016000
1662021-02-260.014000