f/overrides/event-backup/mbsax-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

1.6 KiB

1DateDividends
22020-07-240.006000
32020-08-250.010000
42022-08-250.072000
52023-05-240.049000
62025-04-240.045000
72025-12-120.371000
82026-05-220.064000
92020-02-250.013000
102020-11-230.003000
112020-12-140.003000
122022-03-250.020000
132023-06-260.054000
142023-12-140.057000
152026-01-260.057000
162022-02-220.019000
172023-02-220.042000
182023-11-220.060000
192024-05-240.059000
202024-11-210.034000
212026-04-240.060000
222020-01-240.020000
232021-01-250.003000
242026-07-270.059000
252019-11-250.030000
262020-03-250.013000
272020-05-260.006000
282023-08-250.048000
292024-08-260.049000
302020-10-260.005000
312022-06-240.023000
322022-07-250.029000
332022-10-250.015000
342023-04-240.048000
352020-09-240.014000
362021-02-220.004000
372024-09-240.063000
382021-04-260.004000
392023-03-270.048000
402024-01-250.057000
412025-10-270.064000
422023-09-250.056000
432024-04-240.054000
442025-02-240.039000
452020-04-240.014000
462021-07-260.003000
472024-06-240.055000
482025-03-250.047000
492025-09-240.065000
502025-11-210.056000
512026-03-250.065000
522020-06-240.005000
532021-03-250.005000
542021-11-220.019000
552022-01-250.020000
562022-04-250.016000
572023-10-250.050000
582025-08-250.060000
592019-12-170.012000
602024-07-250.060000
612025-07-250.049000
622021-08-250.002000
632022-05-240.020000
642024-03-220.058000
652025-01-270.044000
662026-02-230.060000
672021-10-250.014000
682022-12-140.048000
692023-01-250.047000
702023-07-250.052000
712021-05-240.005000
722021-09-240.002000
732021-12-150.110000
742022-09-260.025000
752024-02-230.055000
762024-10-250.056000
772025-05-230.052000
782025-06-240.048000
792021-06-240.003000
802022-11-230.040000
812024-12-130.040000
822026-06-240.064000