f/overrides/event-backup/etncx-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

7.7 KiB

1DateDividends
22008-04-300.032000
32011-05-310.036000
42019-03-290.019000
51996-07-310.043000
61998-05-290.043000
72002-07-310.038000
82002-08-300.038000
92005-06-300.033000
102009-11-300.033000
112009-12-310.035000
122010-10-290.035000
131995-03-220.033000
141996-12-310.043000
151997-01-310.043000
161997-08-290.043000
172010-12-310.036000
182023-12-290.021000
192024-09-300.022000
202026-02-270.022000
211996-03-290.043000
222008-12-310.034000
232011-04-290.036000
242015-05-290.027000
252020-09-300.016000
262021-08-310.012000
272009-02-270.030000
282013-02-280.030000
292013-03-280.031000
302015-11-300.027000
312013-12-310.033000
322017-09-290.024000
332018-11-300.023000
342020-06-300.018000
351997-04-300.041000
362000-10-310.040000
372006-04-280.033000
382012-01-310.034000
392020-10-300.015000
402000-12-290.040000
412014-01-310.033000
422020-12-310.014000
431996-02-290.050000
441996-05-310.043000
451998-03-310.043000
461999-02-260.037000
472014-07-310.028000
482015-07-310.026000
492023-07-310.018000
502003-10-310.038000
512004-01-300.037000
522008-03-310.034000
532010-11-300.035000
542025-01-310.023000
551998-09-300.041000
562005-11-300.033000
572017-11-300.023000
582024-06-280.022000
592004-08-310.037000
602012-06-290.032000
612019-04-300.019000
621994-02-220.040000
631995-07-240.038000
641999-08-310.041000
652003-02-280.035000
661999-10-290.041000
672000-09-290.039000
682002-03-280.038000
692003-12-310.037000
701996-11-290.041000
711997-07-310.043000
721998-11-300.040000
731999-01-290.041000
742010-04-300.036000
752012-09-280.031000
762014-05-300.029000
772024-01-310.021000
782003-07-310.038000
792011-09-300.035000
802014-02-280.031000
812019-07-310.019000
822016-01-290.026000
832017-08-310.023000
842022-08-310.013000
852024-03-280.021000
861994-06-220.040000
872002-05-310.038000
882009-03-310.034000
892010-03-310.035000
902024-07-310.022000
912008-01-310.034000
922016-08-310.024000
932021-11-300.012000
941998-07-310.041000
952004-10-290.037000
962006-10-310.034000
972007-10-310.034000
982016-06-300.025000
992019-05-310.019000
1002020-02-280.019000
1012026-07-310.023000
1021994-10-240.043000
1031998-02-270.039000
1042006-12-290.034000
1052009-10-300.035000
1061994-08-220.041000
1072004-09-300.036000
1082010-01-290.035000
1092013-09-300.032000
1102023-05-310.018000
1111999-06-300.040000
1122002-12-310.038000
1132015-02-270.027000
1142019-09-300.018000
1152013-04-300.031000
1162017-01-310.025000
1172022-10-310.014000
1182023-10-310.021000
1191996-04-300.041000
1201999-04-300.040000
1212009-09-300.033000
1222012-03-300.033000
1232025-12-310.024000
1242023-08-310.019000
1252025-10-310.022000
1262026-04-300.023000
1272026-05-290.022000
1281999-09-300.040000
1292005-09-300.033000
1302011-06-300.036000
1312018-06-290.023000
1322012-10-310.031000
1332022-03-310.011000
1342025-07-310.022000
1352026-03-310.022000
1362001-03-300.040000
1372002-04-300.037000
1382006-11-300.033000
1392007-11-300.033000
1402001-04-300.038000
1412006-05-310.034000
1422010-07-300.035000
1432009-04-300.033000
1442014-06-300.028000
1452019-02-280.020000
1462021-03-310.014000
1472025-11-280.023000
1482003-11-280.036000
1492007-09-280.033000
1502008-06-300.032000
1512017-06-300.024000
1521994-03-220.037000
1531997-12-310.043000
1542015-12-310.027000
1552017-07-310.024000
1562020-08-310.017000
1572022-12-300.015000
1581995-01-230.038000
1591995-05-220.033000
1602005-02-280.032000
1612006-06-300.033000
1622023-06-300.018000
1632024-05-310.021000
1642025-06-300.023000
1652001-10-310.038000
1662003-01-310.038000
1672020-04-300.019000
1682022-01-310.012000
1692022-04-290.012000
1702024-04-300.022000
1711998-12-310.041000
1722005-03-310.035000
1732007-05-310.034000
1742012-05-310.033000
1752015-10-300.026000
1762016-10-310.024000
1772017-04-280.024000
1781995-09-220.037000
1791997-06-300.041000
1802013-05-310.031000
1812013-08-300.032000
1822017-10-310.023000
1832022-06-300.013000
1841998-10-300.041000
1852000-03-310.041000
1862002-09-300.037000
1872016-03-310.026000
1881999-05-280.041000
1892005-01-310.036000
1902010-05-280.036000
1911994-07-220.040000
1921994-11-220.039000
1931995-08-220.034000
1941997-09-300.041000
1952023-03-310.016000
1962023-09-290.020000
1971995-06-220.037000
1982015-04-300.027000
1992017-05-310.024000
2002018-12-310.021000
2011995-02-220.035000
2022013-10-310.033000
2032016-05-310.025000
2042024-10-310.022000
2052007-07-310.034000
2062012-12-310.031000
2072014-09-300.027000
2082015-01-300.027000
2091996-09-300.041000
2101999-07-300.041000
2111999-11-300.040000
2122003-06-300.037000
2132016-04-290.026000
2142014-12-310.027000
2152019-11-290.019000
2162020-07-310.017000
2172020-11-300.014000
2181997-02-280.039000
2192006-07-310.034000
2202011-01-310.037000
2212011-03-310.037000
2222021-02-260.015000
2232025-08-290.023000
2242007-08-310.034000
2252014-03-310.030000
2262014-08-290.027000
2272015-06-300.027000
2281995-12-220.035000
2292000-05-310.040000
2302002-02-280.035000
2312003-09-300.037000
2322019-12-310.019000
2332021-01-290.014000
2342026-01-300.021000
2352013-06-280.031000
2362015-08-310.026000
2372019-08-300.018000
2382022-02-280.013000
2391994-05-230.041000
2402000-04-280.040000
2412002-10-310.038000
2422010-02-260.031000
2432022-07-290.013000
2442022-09-300.014000
2452001-09-280.037000
2462004-06-300.036000
2472008-08-290.034000
2482008-10-310.034000
2491995-10-230.037000
2501996-08-300.043000
2511998-06-300.041000
2522001-08-310.039000
2532019-06-280.018000
2542022-05-310.012000
2552007-02-280.031000
2562019-01-310.020000
2572020-03-310.019000
2582001-11-300.037000
2592012-11-300.031000
2602016-12-300.024000
2612018-05-310.023000
2622001-02-280.037000
2632007-04-300.033000
2642011-11-300.034000
2652014-10-310.027000
2662002-11-290.037000
2672010-09-300.035000
2682018-01-310.023000
2692009-08-310.035000
2702011-02-280.037000
2712011-08-310.036000
2722018-07-310.023000
2731996-06-280.041000
2742005-05-310.035000
2752006-03-310.034000
2762007-01-310.034000
2772000-07-310.040000
2782004-12-310.037000
2792008-02-290.031000
2802023-11-300.021000
2812009-07-310.035000
2822018-09-280.023000
2832022-11-300.015000
2842023-02-280.017000
2852001-01-310.041000
2862005-08-310.034000
2872011-07-290.036000
2882009-05-290.035000
2892013-01-310.031000
2901994-09-220.041000
2912000-01-310.041000
2922003-04-300.037000
2932007-12-310.034000
2942026-06-300.023000
2952005-12-300.034000
2962018-03-290.023000
2972020-01-310.019000
2982023-04-280.017000
2992004-11-300.036000
3002006-09-290.033000
3012008-11-280.032000
3022018-04-300.022000
3031998-04-300.041000
3042000-06-300.039000
3052001-06-290.038000
3062004-04-300.036000
3072018-10-310.022000
3082012-08-310.032000
3092017-12-290.023000
3102008-07-310.034000
3112021-12-310.012000
3121994-01-240.058000
3131996-01-220.036000
3141997-03-310.043000
3152004-05-280.037000
3161995-04-240.039000
3171999-12-310.041000
3182000-11-300.039000
3192021-07-300.012000
3202007-03-300.034000
3212009-06-300.033000
3222017-02-280.025000
3232021-04-300.015000
3241994-04-220.041000
3251997-05-300.043000
3262000-08-310.040000
3272006-08-310.034000
3281998-01-300.043000
3292019-10-310.018000
3302012-04-300.033000
3312012-07-310.032000
3322016-07-290.024000
3331996-10-310.043000
3342000-02-290.039000
3352003-05-300.038000
3362005-04-290.034000
3372002-06-280.037000
3382009-01-300.034000
3392013-07-310.031000
3402017-03-310.024000
3412018-02-280.024000
3422021-10-290.012000
3432025-02-280.022000
3441997-10-310.050000
3452003-03-310.038000
3462004-07-300.037000
3472005-07-290.034000
3482021-09-300.012000
3491997-11-280.041000
3502007-06-290.033000
3512011-12-300.035000
3522014-04-300.029000
3532021-05-280.013000
3542024-12-310.023000
3552001-05-310.039000
3562012-02-290.033000
3572015-03-310.027000
3582016-02-290.026000
3592024-11-290.023000
3602024-02-290.021000
3612002-01-310.038000
3622003-08-290.038000
3632008-09-300.032000
3642010-06-300.035000
3652011-10-310.034000
3662018-08-310.022000
3672025-05-300.022000
3681994-12-220.035000
3691998-08-310.041000
3702001-12-310.038000
3712008-05-300.034000
3722016-11-300.024000
3732025-03-310.023000
3742025-09-300.023000
3751999-03-310.041000
3762006-02-280.031000
3772014-11-280.027000
3782016-09-300.024000
3792013-11-290.032000
3802015-09-300.025000
3812021-06-300.013000
3822023-01-310.015000
3831995-11-220.035000
3842004-02-270.035000
3852004-03-310.037000
3862005-10-310.034000
3872024-08-300.022000
3882025-04-300.023000
3892001-07-310.039000
3902006-01-310.034000
3912010-08-310.035000
3922020-05-290.019000