f/overrides/event-backup/csfyx-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

955 B

1DateDividends
22024-03-200.136000
32016-09-220.138000
42017-12-130.172000
52018-06-210.119000
62021-12-143.239000
72021-06-182.357000
82023-03-200.149000
92023-06-210.166000
102023-09-210.123000
112014-12-100.432000
122015-09-220.147000
132018-09-210.122000
142020-03-200.138000
152020-12-111.396000
162025-12-110.102000
172026-06-180.976000
182016-03-230.051000
192016-12-140.207000
202018-12-130.714000
212020-06-170.827000
222022-03-180.083000
232022-06-211.588000
242023-12-130.141000
252024-06-210.110000
262015-06-220.558000
272017-09-210.156000
282019-09-200.144000
292019-12-130.884000
302024-12-120.128000
312025-03-200.115000
322025-09-190.107000
332026-03-190.128000
342017-06-220.146000
352018-03-210.116000
362019-03-200.128000
372022-09-210.090000
382016-06-230.086000
392017-03-220.146000
402021-09-210.083000
412022-12-130.148000
422024-09-200.125000
432015-03-200.148000
442015-12-140.848000
452020-09-220.071000
462021-03-180.094000
472019-06-170.318000
482025-06-200.125000