f/overrides/event-backup/ergox-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

4.9 KiB

1DateDividends
22022-04-290.008000
32009-11-300.027000
42019-06-280.016000
52020-10-300.008000
62014-07-310.023000
72025-10-310.024000
82006-08-310.032000
92011-03-310.023000
102013-12-300.030000
112017-01-310.016000
122019-08-300.013000
132024-10-310.024000
142022-11-300.012000
152008-06-300.027000
162008-09-300.027000
172009-04-300.027000
182007-05-310.032000
192013-09-300.021000
202021-04-300.007000
212019-02-280.016000
222005-08-310.020000
232013-07-310.022000
242018-03-290.017000
252024-09-300.023000
262012-10-310.022000
272015-10-300.018000
282020-03-310.012000
292012-08-310.022000
302013-02-280.020000
312016-07-290.016000
322016-12-300.015000
332018-01-310.017000
342007-02-280.029000
352009-06-300.027000
362012-07-310.022000
372015-01-300.021000
382015-12-310.016000
392018-08-310.016000
402025-04-300.023000
412025-06-300.023000
422015-03-310.021000
432017-06-300.017000
442017-09-290.017000
452006-11-300.031000
462006-12-290.032000
472009-01-300.028000
482014-02-280.021000
492016-08-310.016000
502007-07-310.032000
512018-07-310.014000
522025-09-300.023000
532007-04-300.031000
542013-01-310.022000
552020-06-300.010000
562006-03-310.037000
572013-12-310.023000
582014-08-290.022000
592015-07-310.020000
602006-07-310.034000
612007-10-310.032000
622013-04-300.021000
632010-10-290.025000
642014-04-300.023000
652017-04-280.017000
662023-04-280.023000
672008-08-290.028000
682014-06-300.023000
692023-03-310.024000
702021-09-300.009000
712022-12-300.025000
722012-04-300.021000
732016-06-300.017000
742020-02-280.013000
752014-05-300.023000
762016-09-300.016000
772021-11-300.006000
782023-05-310.024000
792024-05-310.024000
802008-03-310.032000
812008-11-280.027000
822009-09-300.027000
832026-02-270.021000
842021-06-300.008000
852009-07-310.028000
862013-11-290.023000
872019-07-310.015000
882021-03-310.007000
892023-11-300.023000
902026-04-300.023000
912012-11-300.021000
922013-08-300.022000
932017-02-280.018000
942018-09-280.016000
952019-11-290.014000
962023-08-310.024000
972024-01-310.024000
982012-12-310.022000
992014-11-280.021000
1002017-07-310.017000
1012020-05-290.011000
1022022-02-280.008000
1032026-06-300.023000
1042006-04-280.035000
1052012-05-310.022000
1062019-01-310.015000
1072020-04-300.012000
1082013-05-310.022000
1092015-06-300.020000
1102021-12-310.007000
1112010-11-300.024000
1122014-09-300.021000
1132019-12-310.021000
1142024-07-310.024000
1152006-09-290.031000
1162007-06-290.031000
1172008-07-310.028000
1182011-02-280.021000
1192014-12-310.021000
1202025-03-310.024000
1212012-03-300.022000
1222016-02-290.017000
1232019-10-310.013000
1242020-09-300.008000
1252023-01-310.030000
1262006-01-310.040000
1272009-02-270.025000
1282011-12-300.022000
1292025-07-310.024000
1302022-06-300.009000
1312010-01-290.025000
1322021-07-300.009000
1332022-01-310.009000
1342014-03-310.023000
1352017-11-300.017000
1362006-06-300.034000
1372010-05-280.025000
1382011-07-290.023000
1392017-12-290.016000
1402019-03-290.015000
1412021-05-280.007000
1422008-05-300.028000
1432012-09-280.021000
1442015-11-300.017000
1452011-04-290.023000
1462018-12-310.015000
1472005-10-310.041000
1482006-10-310.032000
1492008-10-310.028000
1502011-06-300.023000
1512014-10-310.021000
1522024-02-290.022000
1532012-06-290.021000
1542025-01-310.024000
1552016-11-300.015000
1562019-05-310.014000
1572019-09-300.014000
1582025-02-280.021000
1592009-10-300.028000
1602010-09-300.024000
1612015-02-270.021000
1622024-04-300.023000
1632009-12-310.028000
1642011-05-310.023000
1652018-05-310.018000
1662026-05-290.024000
1672026-07-310.024000
1682007-01-310.032000
1692021-02-260.008000
1702021-08-310.009000
1712015-09-300.019000
1722017-03-310.017000
1732021-01-290.007000
1742022-03-310.007000
1752023-07-310.024000
1762005-12-300.040000
1772007-08-310.032000
1782011-10-310.022000
1792026-01-300.024000
1802007-12-310.032000
1812015-08-310.020000
1822016-03-310.018000
1832018-02-280.016000
1842016-05-310.017000
1852024-11-290.023000
1862005-09-300.040000
1872005-11-300.038000
1882011-01-310.025000
1892010-06-300.024000
1902011-11-300.021000
1912014-01-310.023000
1922016-10-310.015000
1932020-08-310.008000
1942022-09-300.014000
1952023-12-290.024000
1962025-12-310.024000
1972007-03-300.032000
1982016-01-290.016000
1992017-05-310.017000
2002006-02-280.036000
2012020-12-310.007000
2022023-10-310.024000
2032013-10-310.022000
2042018-04-300.018000
2052023-06-300.023000
2062008-12-310.028000
2072022-07-290.011000
2082024-12-310.024000
2092007-09-280.031000
2102018-11-300.016000
2112019-04-300.014000
2122015-04-300.021000
2132010-07-300.025000
2142012-01-310.022000
2152013-06-280.021000
2162022-10-310.011000
2172008-02-290.030000
2182015-05-290.020000
2192016-04-290.017000
2202025-08-290.024000
2212026-03-310.024000
2222007-11-300.031000
2232009-05-290.028000
2242024-03-280.024000
2252018-10-310.015000
2262020-11-300.008000
2272021-10-290.008000
2282023-09-290.023000
2292024-06-280.023000
2302006-05-310.037000
2312010-02-260.022000
2322013-03-280.022000
2332012-02-290.020000
2342022-05-310.008000
2352025-11-280.023000
2362023-02-280.020000
2372024-08-300.024000
2382025-05-300.024000
2392008-01-310.032000
2402010-08-310.025000
2412020-07-310.009000
2422009-03-310.028000
2432011-08-310.022000
2442020-01-310.013000
2452009-08-310.028000
2462011-09-300.021000
2472017-08-310.019000
2482017-10-310.016000
2492018-06-290.010000
2502022-08-310.012000
2512008-04-300.027000
2522010-03-310.025000
2532010-12-310.025000