f/overrides/event-backup/mxdqx-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

855 B

1DateDividends
22024-12-270.340000
32016-12-280.124000
42017-12-270.098000
52019-03-250.066000
62019-06-240.071000
72022-12-280.109000
82025-12-290.323000
92016-06-240.065000
102018-03-230.063000
112020-03-250.059000
122020-09-250.044000
132019-09-250.067000
142019-12-270.067000
152022-09-270.073000
162015-06-190.060000
172015-09-040.004000
182017-06-230.072000
192018-12-270.096000
202021-09-030.027000
212023-12-270.102000
222015-09-210.069000
232016-09-230.048000
242017-03-210.053000
252020-06-240.057000
262016-03-240.063000
272021-12-290.192000
282022-03-250.021000
292024-09-060.007000
302025-09-050.009000
312015-12-290.106000
322018-06-220.069000
332021-03-240.030000
342023-03-270.073000
352023-09-260.096000
362017-09-220.074000
372020-12-290.073000
382021-06-230.027000
392021-09-240.011000
402018-09-070.002000
412018-09-210.062000
422022-06-230.038000
432023-06-230.089000