f/overrides/event-backup/nweix-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

1.5 KiB

1DateDividends
22024-09-120.028000
32024-12-230.682000
42026-03-250.020000
52011-06-210.063000
62011-09-200.033000
72018-09-120.042000
82010-09-240.035000
92022-06-090.026000
102025-12-230.234000
112021-12-230.796000
122008-12-310.008000
132019-09-120.045000
142020-09-100.172000
152009-03-240.029000
162019-06-110.054000
172021-06-100.027000
182008-09-230.065000
192014-09-180.042000
202018-03-130.031000
212013-06-250.023000
222014-03-180.016000
232017-09-140.050000
242011-12-210.752000
252016-03-150.028000
262026-06-240.032000
272020-12-230.165000
282023-03-160.008000
292024-06-130.029000
302007-09-250.038000
312008-12-220.063000
322009-06-230.055000
332010-06-220.051000
342014-02-180.009000
352017-06-130.051000
362007-12-260.091000
372008-06-240.050000
382010-03-230.019000
392018-06-120.058000
402023-09-140.021000
412011-03-220.021000
422012-03-200.012000
432014-12-190.741000
442021-03-110.019000
452009-12-220.119000
462013-03-190.018000
472015-12-210.665000
482020-06-110.031000
492022-09-150.023000
502025-06-120.029000
512010-12-290.170000
522017-03-140.026000
532018-12-200.469000
542012-12-210.340000
552013-12-200.306000
562015-03-170.022000
572016-09-150.031000
582019-12-230.476000
592008-03-250.045000
602009-09-220.046000
612012-09-110.026000
622025-09-110.025000
632023-06-150.028000
642023-12-220.360000
652024-03-140.011000
662020-03-120.022000
672012-06-190.043000
682013-09-260.020000
692015-06-160.047000
702022-03-100.015000
712015-09-150.037000
722016-06-140.047000
732019-03-120.025000
742021-09-090.030000
752022-12-230.282000
762025-03-130.014000
772014-06-170.041000
782016-12-190.494000
792017-12-200.406000