f/overrides/event-backup/dscgx-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

955 B

1DateDividends
22019-09-270.030000
32020-12-160.053000
42022-03-300.034000
52023-06-290.043000
62015-06-080.025000
72015-09-090.022000
82018-12-180.736000
92019-06-270.037000
102024-03-270.041000
112026-06-290.054000
122016-06-290.029000
132017-03-300.033000
142021-03-300.017000
152025-03-280.049000
162023-03-300.043000
172015-12-160.143000
182017-06-290.034000
192017-09-280.030000
202022-09-290.043000
212024-12-130.046000
222018-03-280.034000
232019-12-170.148000
242021-06-290.024000
252024-09-270.044000
262016-12-150.126000
272019-03-280.033000
282020-06-290.023000
292024-06-270.047000
302025-06-270.047000
312025-12-150.048000
322015-03-090.022000
332018-06-280.038000
342021-09-290.055000
352022-06-290.037000
362026-03-300.042000
372017-12-150.221000
382020-09-290.019000
392021-12-151.995000
402025-09-290.039000
412020-03-300.038000
422022-12-140.749000
432023-09-280.038000
442023-12-130.060000
452014-12-160.104000
462016-03-300.034000
472016-09-290.034000
482018-09-270.037000