f/overrides/event-backup/dmszx-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
22019-03-280.042000
32023-06-290.142000
42018-09-270.117000
52024-06-270.146000
62025-03-280.046000
72023-09-280.147000
82026-06-290.094000
92019-06-270.129000
102022-06-290.052000
112022-09-290.074000
122022-12-290.141000
132023-03-300.038000
142024-12-300.290000
152019-12-160.033000
162021-06-290.029000
172021-09-290.025000
182022-03-300.017000
192024-09-270.156000
202025-09-290.135000
212025-12-170.105000
222026-03-300.035000
232019-12-270.159000
242020-09-290.045000
252021-03-300.011000
262021-12-290.172000
272024-12-180.016000
282020-03-300.024000
292021-12-160.265000
302022-12-150.027000
312023-12-280.369000
322018-12-270.132000
332020-06-290.060000
342020-12-290.037000
352024-03-270.049000
362018-12-170.173000
372019-09-260.094000
382025-06-270.133000
392025-12-300.120000