f/overrides/event-backup/grgdx-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

855 B

1DateDividends
22023-12-280.107000
32019-09-270.034000
42020-12-300.118000
52021-09-290.056000
62022-12-070.876000
72022-12-230.089000
82023-09-280.042000
92019-03-280.052000
102019-06-270.079000
112025-12-050.613000
122026-06-290.063000
132024-03-270.045000
142024-06-270.080000
152022-03-300.035000
162020-09-290.047000
172021-12-300.308000
182022-06-290.106000
192024-12-060.643000
202025-12-300.154000
212018-03-290.050000
222021-06-290.054000
232021-03-300.036000
242022-09-290.043000
252023-06-290.087000
262024-09-270.038000
272018-09-270.068000
282019-12-300.148000
292019-12-100.274000
302023-03-300.043000
312023-12-070.271000
322025-03-280.032000
332026-03-300.035000
342018-06-280.068000
352018-09-280.068000
362020-06-290.045000
372021-12-100.724000
382024-12-300.194000
392025-09-290.041000
402018-12-280.121000
412020-03-300.046000
422018-12-130.317000
432025-06-270.072000