f/overrides/event-backup/aia-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

775 B

1DateDividends
22018-12-181.052000
32011-12-190.715000
42014-06-240.524000
52015-12-210.960000
62019-12-161.060000
72025-06-160.816000
82026-06-150.515000
92008-06-230.257000
102012-12-170.476000
112016-12-220.826000
122012-06-200.427000
132009-12-210.253000
142022-06-090.518000
152008-12-220.446000
162009-06-220.250000
172010-12-200.398000
182020-06-150.260000
192020-12-140.706000
202023-12-200.992000
212007-12-240.018000
222013-12-170.470000
232016-06-210.235000
242018-06-190.328000
252021-06-100.449000
262022-12-130.950000
272010-06-210.336000
282017-06-200.191000
292017-12-210.769000
302019-06-170.418000
312021-12-130.726000
322023-06-070.527000
332024-06-110.378000
342011-06-210.450000
352014-12-190.531000
362015-06-240.258000
372024-12-171.510000
382025-12-161.625000
392013-06-250.521000