f/overrides/event-backup/madfx-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

775 B

1DateDividends
22026-03-200.160000
32018-12-200.190000
42022-06-240.140000
52024-12-130.200000
62019-09-270.170000
72019-12-200.280000
82021-12-170.370000
92023-06-230.130000
102017-06-300.120000
112017-12-200.210000
122018-03-290.110000
132025-03-210.150000
142025-12-122.370000
152017-03-280.130000
162021-03-260.160000
172024-09-200.170000
182021-09-290.150000
192022-03-250.130000
202025-09-190.180000
212023-03-240.140000
222025-06-130.180000
232018-06-290.120000
242019-03-290.270000
252021-06-250.170000
262024-03-220.140000
272024-06-210.160000
282026-06-120.180000
292017-09-290.130000
302018-09-280.150000
312023-09-220.150000
322022-12-161.820000
332023-12-150.190000
342020-03-270.180000
352020-12-180.170000
362022-09-230.160000
372019-06-280.140000
382020-06-260.160000
392020-09-290.160000