f/overrides/event-backup/lsyux-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
22022-04-290.052000
32022-10-310.053000
42024-06-280.070000
52020-09-300.056000
62021-11-300.048000
72022-02-280.049000
82023-11-300.066000
92024-07-310.070000
102020-06-300.057000
112020-10-300.057000
122022-06-300.052000
132024-05-310.071000
142025-04-300.069000
152022-01-310.050000
162022-05-310.053000
172021-06-300.051000
182021-12-310.050000
192023-05-310.064000
202023-07-310.066000
212023-12-290.066000
222024-02-290.069000
232020-04-300.006000
242021-03-310.050000
252025-02-280.064000
262025-11-280.066000
272025-05-300.067000
282025-10-310.065000
292021-12-170.173000
302022-08-310.055000
312023-08-310.066000
322025-03-310.070000
332026-07-310.062000
342021-09-300.049000
352023-03-310.064000
362024-03-280.070000
372024-04-300.070000
382024-11-290.067000
392021-05-280.049000
402023-10-310.068000
412025-09-300.064000
422026-01-300.065000
432026-05-290.065000
442021-08-310.048000
452024-09-300.069000
462020-12-310.052000
472022-11-300.056000
482023-02-280.063000
492023-06-300.065000
502020-07-310.059000
512020-08-310.056000
522020-12-180.074000
532024-12-170.049000
542023-09-290.065000
552024-10-310.066000
562024-12-310.075000
572025-07-310.066000
582026-04-300.066000
592021-01-290.049000
602021-04-300.048000
612021-02-260.049000
622022-09-300.056000
632022-12-300.057000
642023-04-280.063000
652024-01-310.071000
662025-01-310.067000
672025-12-310.073000
682020-11-300.055000
692022-07-290.054000
702023-01-310.061000
712024-08-300.071000
722025-08-290.066000
732020-05-290.053000
742021-07-300.049000
752025-06-300.064000
762026-02-270.064000
772026-03-310.068000
782026-06-300.063000
792021-10-290.049000
802022-03-310.052000