f/overrides/event-backup/mstgx-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

1.7 KiB

1DateDividends
22020-05-290.032000
32021-11-300.023000
42024-06-280.119000
52025-04-300.058000
62025-07-310.038000
72019-10-310.033000
82021-04-300.040000
92021-06-300.101000
102022-05-310.054000
112023-04-280.028000
122023-05-310.040000
132026-04-300.042000
142021-12-300.016000
152023-01-310.077000
162023-06-300.127000
172025-05-300.039000
182025-08-290.031000
192026-01-300.015000
202018-12-310.054000
212020-06-300.032000
222023-12-280.038000
232024-01-310.037000
242024-12-300.095000
252026-07-310.038000
262023-03-310.049000
272023-07-310.035000
282019-12-200.050000
292019-12-300.073000
302020-08-310.037000
312021-05-280.029000
322021-07-300.036000
332022-03-310.050000
342021-02-260.019000
352021-09-300.033000
362022-01-310.025000
372026-02-270.026000
382026-05-290.021000
392019-11-270.029000
402020-09-300.027000
412020-12-180.007000
422020-12-300.051000
432024-07-310.039000
442025-02-280.011000
452020-11-300.031000
462021-10-290.043000
472025-12-300.062000
482020-10-300.024000
492022-06-300.040000
502024-08-300.038000
512025-03-310.025000
522024-04-300.053000
532024-09-300.033000
542020-03-310.018000
552021-12-170.735000
562022-02-280.016000
572022-12-160.335000
582023-09-290.035000
592024-02-290.032000
602024-10-310.034000
612019-03-290.046000
622019-08-300.056000
632021-08-310.028000
642022-07-290.017000
652022-11-300.042000
662025-09-300.027000
672020-02-280.018000
682022-10-310.030000
692023-08-310.040000
702023-10-310.035000
712019-09-300.019000
722024-05-310.052000
732025-06-300.076000
742026-06-300.168000
752024-11-290.037000
762021-03-310.039000
772022-04-290.055000
782022-08-310.091000
792022-09-300.028000
802023-02-280.037000
812024-03-280.043000
822019-06-280.147000
832020-04-300.029000
842025-10-310.032000
852026-03-310.040000
862020-07-310.024000
872023-11-300.047000
882025-11-280.033000