f/overrides/event-backup/lizkx-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

735 B

1DateDividends
22018-09-280.054000
32018-12-310.096000
42021-12-310.205000
52023-06-300.142000
62025-07-170.001000
72020-09-300.034000
82022-06-300.133000
92026-07-220.013000
102016-06-300.075000
112017-09-290.038000
122017-12-290.142000
132019-12-310.167000
142023-12-220.167000
152017-06-300.077000
162021-09-300.041000
172022-03-310.032000
182022-09-300.043000
192023-09-290.042000
202018-06-290.101000
212021-03-310.030000
222021-06-300.123000
232016-12-300.075000
242019-03-280.043000
252019-06-280.128000
262020-03-310.034000
272020-12-310.110000
282022-12-230.089000
292023-03-310.039000
302016-03-310.024000
312016-09-300.015000
322017-03-310.024000
332018-03-290.027000
342019-09-270.043000
352020-06-300.090000
362024-12-240.440000
372025-12-290.565000