f/overrides/event-backup/mhysx-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

3.1 KiB

1DateDividends
22026-01-300.027000
32017-05-310.032000
42022-03-310.023000
52025-03-310.028000
62025-10-310.029000
72016-01-290.032000
82017-11-300.032000
92022-01-310.025000
102013-10-310.037000
112014-04-300.035000
122014-08-290.035000
132015-03-310.032000
142016-08-310.032000
152018-05-310.028000
162023-10-310.028000
172023-02-280.023000
182024-06-280.027000
192025-06-300.028000
202026-07-310.027000
212016-04-290.032000
222019-10-310.028000
232021-04-300.025000
242022-08-310.023000
252017-07-310.032000
262017-12-210.032000
272022-04-290.023000
282025-05-300.028000
292023-12-210.031000
302016-02-290.032000
312018-01-310.028000
322019-03-290.028000
332019-07-310.028000
342021-10-290.025000
352023-11-300.026000
362025-01-310.028000
372015-01-300.032000
382016-03-310.032000
392018-08-310.028000
402021-01-290.025000
412015-12-160.032000
422017-02-280.032000
432019-06-280.028000
442026-04-300.024000
452014-06-270.035000
462018-11-300.028000
472020-04-300.028000
482020-09-300.028000
492017-10-310.032000
502021-05-280.025000
512021-12-160.025000
522014-07-310.035000
532014-12-160.035000
542017-09-290.032000
552020-07-310.028000
562024-08-300.027000
572024-10-310.027000
582019-02-280.028000
592020-10-300.028000
602022-02-280.023000
612023-01-310.025000
622024-07-310.027000
632025-02-280.026000
642014-03-280.035000
652014-11-280.035000
662016-12-150.032000
672020-01-310.028000
682024-01-310.027000
692024-05-310.027000
702014-01-310.035000
712014-05-300.035000
722021-06-300.025000
732023-08-310.026000
742015-10-300.032000
752020-11-300.025000
762026-03-310.028000
772015-05-290.032000
782018-02-280.028000
792019-12-190.028000
802024-11-290.026000
812016-09-300.032000
822017-01-310.032000
832022-12-210.023000
842024-02-290.032000
852024-04-300.029000
862015-11-300.032000
872021-02-260.025000
882021-08-310.025000
892023-03-310.023000
902019-01-310.028000
912019-04-300.028000
922023-04-280.024000
932026-05-290.027000
942026-02-270.025000
952022-11-300.023000
962023-09-290.025000
972025-07-310.030000
982025-12-180.030000
992015-07-310.032000
1002018-10-310.028000
1012020-02-280.028000
1022022-10-310.023000
1032015-02-270.032000
1042015-08-310.032000
1052016-11-300.032000
1062022-06-300.023000
1072024-09-300.026000
1082025-09-300.028000
1092015-04-300.032000
1102017-06-300.032000
1112019-05-310.028000
1122019-08-300.028000
1132021-09-300.025000
1142014-02-280.035000
1152014-10-310.035000
1162015-06-300.032000
1172020-06-300.028000
1182013-08-300.037000
1192022-07-290.023000
1202026-06-300.027000
1212020-05-290.028000
1222021-07-300.025000
1232022-05-310.023000
1242025-11-280.027000
1252015-09-300.032000
1262018-03-290.028000
1272018-07-310.028000
1282019-11-290.028000
1292013-12-160.037000
1302016-05-310.032000
1312023-06-300.025000
1322024-03-280.027000
1332017-03-310.032000
1342021-11-300.025000
1352023-05-310.026000
1362023-07-310.026000
1372013-07-310.037000
1382013-11-290.037000
1392025-04-300.028000
1402025-08-290.028000
1412014-09-290.035000
1422016-06-300.032000
1432018-09-280.028000
1442020-12-170.025000
1452024-12-180.027000
1462017-08-310.032000
1472019-09-300.028000
1482020-03-310.028000
1492022-09-300.023000
1502018-04-300.028000
1512018-06-290.028000
1522018-12-200.028000
1532020-08-310.028000
1542013-09-270.037000
1552016-07-290.032000
1562016-10-310.032000
1572017-04-280.032000
1582021-03-310.025000