f/overrides/event-backup/ewco-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

635 B

1DateDividends
22020-06-220.069390
32022-09-190.098010
42022-03-210.092440
52022-06-210.100270
62023-06-200.032840
72025-12-220.129170
82025-06-230.085130
92019-12-230.196520
102020-09-210.096840
112021-09-200.094460
122024-03-180.081880
132024-06-240.080680
142024-09-230.092190
152025-03-240.101040
162021-06-210.085200
172026-06-220.089500
182020-12-210.092480
192021-12-200.118300
202019-06-240.076300
212020-03-230.073090
222022-12-190.072890
232023-12-180.089650
242025-09-220.344660
252026-03-230.086950
262018-12-240.053360
272019-03-180.051180
282019-09-230.078740
292021-03-220.096190
302023-03-200.057000
312023-09-180.108790
322024-12-230.097920