f/overrides/event-backup/jsiyx-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

855 B

1DateDividends
22018-12-310.236000
32019-03-290.101000
42021-12-151.416000
52014-12-310.251000
62016-03-310.075000
72016-06-300.089000
82017-06-300.033000
92017-12-150.272000
102019-12-310.171000
112020-12-310.165000
122021-06-300.095000
132015-03-310.051000
142024-12-310.620000
152021-09-300.072000
162022-12-150.231000
172025-12-150.254000
182019-06-280.124000
192015-12-180.062000
202017-09-290.087000
212020-03-310.095000
222025-12-310.571000
232015-06-300.097000
242020-09-300.089000
252022-12-300.409000
262017-03-310.080000
272018-03-290.094000
282019-09-300.128000
292016-09-300.099000
302017-12-290.181000
312019-12-162.016000
322020-12-150.411000
332021-12-310.227000
342015-12-310.183000
352016-12-300.163000
362017-06-200.057000
372018-06-290.105000
382018-09-280.108000
392018-12-140.496000
402020-06-300.088000
412021-03-310.079000
422015-09-300.069000
432023-12-290.515000