f/overrides/event-backup/ewl-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

835 B

1DateDividends
21997-12-230.025000
32000-12-200.160000
42013-06-270.604000
52003-12-160.030000
62004-12-230.086000
72011-06-220.532000
82014-06-250.788000
92018-06-190.807000
102023-06-071.021000
112001-08-240.094000
122005-12-230.119000
132009-06-230.261000
142011-12-200.018000
152020-06-150.624000
162026-06-151.090000
172000-08-240.157000
182001-12-240.005000
192006-12-200.194000
202008-12-230.065000
212009-12-220.041000
222008-06-250.395000
232010-06-230.324000
242015-06-250.801000
252016-12-210.018000
262021-06-100.915000
272022-06-090.857000
282025-06-161.023000
291997-08-250.570000
301998-08-251.247000
311998-12-220.570000
322002-12-230.029000
332007-12-200.276000
342012-06-210.633000
352024-06-111.017000
361996-08-260.095000
371999-08-250.391000
382003-12-220.053000
392016-06-220.793000
402017-06-200.728000
412019-06-170.750000
422020-12-140.023000