f/overrides/event-backup/ixp-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

935 B

1DateDividends
22006-12-211.512000
32007-12-241.521000
42010-06-211.474000
52019-06-170.889000
62022-12-130.191000
72025-12-163.116000
82014-12-191.078000
92015-12-290.055000
102016-12-221.282000
112017-12-211.035000
122021-06-100.317000
132021-12-131.163000
142011-12-191.308000
152013-12-170.980000
162022-06-090.589000
172023-06-070.457000
182024-12-170.856000
192011-06-211.725000
202015-12-211.136000
212016-06-211.078000
222018-06-191.295000
232005-12-231.231000
242009-12-210.879000
252012-06-201.584000
262025-06-160.498000
272019-12-160.447000
282020-12-140.409000
292001-12-240.015000
302003-12-220.646000
312013-06-251.345000
322014-06-246.370000
332015-06-241.061000
342017-06-201.026000
352023-12-200.469000
362026-06-150.812000
372002-12-230.640000
382004-12-230.668000
392008-12-220.966000
402009-06-221.333000
412010-12-200.993000
422018-12-180.871000
432003-12-160.160000
442008-06-231.428000
452012-12-171.140000
462020-06-150.297000
472024-06-110.446000