f/overrides/event-backup/mctox-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
22022-03-300.210000
32024-10-310.092000
42025-09-300.095000
52025-11-280.127000
62026-03-310.085000
72026-07-310.085000
82022-09-290.210000
92024-02-290.086000
102024-12-310.156000
112025-02-280.088000
122026-01-300.085000
132021-12-300.187000
142022-06-290.225000
152022-12-290.195000
162023-06-290.281000
172025-04-300.085000
182021-12-160.103000
192023-12-180.543000
202024-01-310.086000
212025-03-310.091000
222025-06-300.091000
232026-02-270.085000
242024-08-300.098000
252024-09-300.093000
262025-08-290.093000
272024-04-300.094000
282025-01-310.095000
292025-07-310.096000
302022-12-160.228000
312024-03-280.089000
322024-05-310.073000
332024-06-280.117000
342024-07-310.090000
352026-04-300.085000
362026-06-300.085000
372023-03-300.201000
382023-09-280.233000
392023-12-290.323000
402024-11-290.107000
412024-12-120.243000
422025-05-300.087000
432025-10-310.088000
442025-12-310.286000
452026-05-290.085000