f/overrides/event-backup/esml-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

675 B

1DateDividends
22018-12-170.096000
32020-09-230.084000
42023-09-260.132000
52019-06-170.081000
62021-09-240.122000
72021-12-130.093000
82022-03-240.091000
92024-03-210.108000
102018-09-260.089000
112019-12-160.107000
122020-03-250.065000
132024-12-170.179000
142020-06-150.059000
152023-03-230.113000
162025-06-160.119000
172019-03-200.064000
182021-03-250.093000
192021-06-100.070000
202022-12-130.142000
212024-09-250.138000
222026-03-170.113000
232019-09-240.066000
242022-06-090.096000
252022-09-260.152000
262023-06-070.115000
272024-06-110.088000
282018-06-260.058000
292020-12-140.131000
302023-12-200.139000
312025-12-160.132000
322025-03-180.103000
332025-09-160.143000
342026-06-150.108000