f/overrides/event-backup/cemfx-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

1.0 KiB

1DateDividends
22022-09-290.175000
32026-03-300.073000
42014-03-280.031000
52014-12-300.060000
62015-06-290.098000
72019-09-270.153000
82021-09-290.155000
92018-03-280.046000
102019-12-200.093000
112020-06-290.091000
122022-03-300.072000
132025-12-180.089000
142017-03-300.015000
152017-06-290.101000
162017-12-280.097000
172023-12-210.172000
182026-06-290.134000
192021-06-290.116000
202022-12-220.053000
212013-03-270.024000
222013-12-300.022000
232014-06-270.097000
242020-09-290.094000
252020-12-220.018000
262024-12-190.111000
272025-06-270.081000
282013-06-270.041000
292016-09-290.128000
302018-06-280.078000
312022-06-290.175000
322023-09-280.151000
332021-03-300.041000
342023-06-290.182000
352025-09-290.087000
362013-09-270.087000
372016-03-300.005000
382016-12-290.120000
392017-09-280.202000
402018-09-270.173000
412023-03-300.051000
422024-06-270.112000
432024-09-270.194000
442012-12-280.049000
452015-09-290.297000
462015-12-300.021000
472016-06-290.086000
482020-03-300.041000
492025-03-280.021000
502025-12-300.021000
512014-09-290.186000
522019-03-280.085000
532019-06-270.119000