f/overrides/event-backup/cmalx-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

2.1 KiB

1DateDividends
22023-08-310.098000
32024-11-290.088000
42023-01-310.056000
52023-09-290.073000
62020-04-300.069000
72021-12-300.066000
82023-04-280.086000
92025-07-310.121000
102026-04-300.099000
112026-07-310.111000
122018-08-310.074000
132019-02-280.067000
142021-02-260.056000
152022-09-300.081000
162023-03-310.124000
172025-09-300.090000
182026-02-270.085000
192019-11-290.076000
202020-03-310.085000
212023-02-280.058000
222024-01-310.060000
232025-12-300.975000
242025-10-310.094000
252018-09-280.077000
262018-12-280.213000
272019-03-290.085000
282020-09-300.089000
292024-08-300.074000
302020-07-310.053000
312022-05-310.058000
322023-06-300.101000
332026-06-300.087000
342024-06-280.099000
352024-07-310.078000
362019-04-300.099000
372019-06-280.073000
382021-03-310.076000
392024-04-300.084000
402025-01-310.063000
412020-02-280.071000
422022-06-300.063000
432022-12-290.418000
442019-08-300.086000
452025-04-300.096000
462026-03-310.108000
472018-01-310.059000
482022-07-290.094000
492021-10-290.084000
502023-07-310.159000
512025-11-280.083000
522024-02-290.069000
532019-07-310.090000
542020-05-290.073000
552021-09-300.069000
562024-05-310.091000
572018-10-310.108000
582019-01-310.065000
592021-07-300.066000
602021-11-300.055000
612026-05-290.089000
622025-03-310.102000
632025-05-300.078000
642019-10-310.096000
652021-04-300.089000
662018-02-280.069000
672021-01-290.069000
682025-02-280.086000
692025-06-300.097000
702018-06-290.075000
712022-10-310.084000
722018-05-310.072000
732023-12-280.136000
742020-01-310.038000
752020-08-310.080000
762022-11-300.069000
772017-10-310.017000
782018-03-290.081000
792022-03-310.060000
802023-11-300.076000
812022-08-310.075000
822017-12-280.087000
832022-02-280.075000
842026-01-300.060000
852019-05-310.082000
862020-10-300.060000
872022-01-310.032000
882024-10-310.083000
892017-11-300.141000
902019-12-300.408000
912021-06-300.071000
922021-08-310.072000
932021-05-280.056000
942023-10-310.090000
952024-03-280.105000
962025-08-290.081000
972018-11-300.073000
982020-06-300.091000
992023-05-310.095000
1002020-11-300.070000
1012019-09-300.079000
1022020-12-300.065000
1032022-04-290.091000
1042024-09-300.099000
1052024-12-300.110000
1062018-04-300.089000
1072018-07-310.107000