f/overrides/event-backup/dcmsx-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

895 B

1DateDividends
22018-12-180.079000
32022-09-290.015000
42025-12-150.409000
52017-06-290.013000
62012-12-130.036000
72013-09-100.002000
82014-12-160.069000
92017-03-300.012000
102025-06-270.039000
112026-03-300.017000
122011-12-130.032000
132012-09-100.013000
142020-03-300.003000
152022-12-140.350000
162025-09-290.022000
172021-12-152.152000
182023-09-280.018000
192023-12-130.092000
202024-03-270.004000
212016-03-300.009000
222019-06-270.026000
232011-03-080.005000
242011-06-080.009000
252013-12-120.025000
262014-03-100.013000
272012-06-080.021000
282014-06-090.010000
292017-12-150.149000
302020-12-160.017000
312018-09-270.006000
322019-03-280.001000
332019-12-170.057000
342022-06-290.002000
352013-06-100.018000
362016-06-290.008000
372016-09-290.008000
382017-09-280.011000
392024-06-270.015000
402024-09-270.039000
412026-06-290.042000
422011-09-080.013000
432016-12-150.048000
442024-12-130.070000
452025-03-280.029000