f/overrides/event-backup/aiwex-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

955 B

1DateDividends
22021-06-300.027000
32022-09-300.076000
42022-12-290.080000
52026-03-310.076000
62017-12-280.012000
72018-12-270.037000
82016-03-310.032000
92017-03-310.026000
102020-12-300.038000
112022-03-310.055000
122026-06-300.067000
132014-06-300.029000
142014-09-300.014000
152024-06-280.065000
162025-12-300.016000
172019-03-290.039000
182020-06-300.031000
192020-09-300.027000
202024-09-300.077000
212025-06-300.059000
222015-06-300.021000
232020-03-310.036000
242018-03-290.031000
252022-06-300.065000
262015-03-310.016000
272016-12-280.025000
282021-03-310.037000
292021-12-300.051000
302023-12-280.027000
312016-06-300.038000
322019-09-300.054000
332016-09-300.022000
342018-06-290.025000
352019-06-280.034000
362019-12-300.041000
372023-03-310.084000
382023-06-300.068000
392014-12-290.096000
402015-12-290.031000
412024-03-280.144000
422025-03-310.022000
432018-09-280.023000
442021-09-300.045000
452023-09-290.056000
462025-09-300.044000
472015-09-300.011000
482017-06-300.025000