f/overrides/event-backup/iastx-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

755 B

1DateDividends
22017-12-140.855000
32018-09-130.144000
42019-06-130.072000
52020-09-100.125000
62021-09-160.152000
72023-09-220.149000
82026-03-200.069000
92015-12-101.516000
102023-12-150.237000
112024-09-200.091000
122018-12-130.137000
132026-06-220.277000
142020-03-120.052000
152019-09-120.111000
162021-03-110.053000
172021-06-100.192000
182022-12-153.027000
192024-06-210.168000
202025-09-220.092000
212018-10-313.496000
222019-12-121.084000
232021-12-162.506000
242023-03-220.093000
252019-03-140.059000
262022-03-100.052000
272022-09-150.105000
282025-03-210.075000
292014-12-115.015000
302024-12-131.362000
312020-06-110.095000
322020-12-100.452000
332022-06-070.094000
342023-06-220.129000
352024-03-220.167000
362025-06-200.121000
372025-12-121.992000
382018-06-140.135000