f/overrides/event-backup/hcrb-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

1.5 KiB

1DateDividends
22021-05-270.037000
32022-03-300.051000
42022-07-280.062000
52023-03-300.094000
62024-09-270.104000
72021-09-290.039000
82022-05-270.053000
92022-08-300.081000
102025-05-290.117000
112022-06-290.060000
122023-10-270.097000
132020-07-300.038000
142023-01-270.068000
152024-03-270.099000
162021-10-280.039000
172021-12-170.145000
182022-12-290.086000
192024-08-290.111000
202025-03-280.104000
212026-06-290.119000
222020-05-280.053000
232021-12-300.042000
242023-08-300.107000
252023-11-280.111000
262024-07-300.121000
272024-02-270.096000
282025-08-280.113000
292026-04-290.116000
302020-03-300.072000
312020-04-290.056000
322020-08-280.038000
332022-01-280.039000
342023-02-270.076000
352021-08-300.040000
362024-01-290.113000
372024-04-260.108000
382025-02-270.111000
392026-02-270.113000
402020-11-270.042000
412022-02-250.041000
422023-04-270.083000
432024-05-300.125000
442025-06-270.110000
452025-04-290.135000
462025-07-300.125000
472022-04-280.048000
482022-10-270.069000
492022-11-290.083000
502024-06-270.107000
512024-10-300.112000
522020-10-290.039000
532021-06-290.043000
542021-07-290.028000
552025-11-260.107000
562021-04-290.037000
572022-09-290.068000
582023-05-260.084000
592023-06-290.109000
602021-02-250.033000
612023-09-280.097000
622023-12-280.172000
632025-12-300.181000
642026-01-300.110000
652026-07-300.126000
662021-01-280.030000
672021-11-290.043000
682024-12-310.229000
692025-01-300.111000
702025-10-300.122000
712025-09-290.126000
722026-03-300.124000
732026-05-280.116000
742020-09-290.039000
752020-12-300.369000
762021-03-300.042000
772023-07-280.093000
782024-11-270.106000
792020-06-290.016000