f/overrides/event-backup/mxgsx-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

675 B

1DateDividends
22017-06-230.022000
32021-09-030.903000
42022-06-230.009000
52020-06-240.018000
62025-09-050.266000
72015-12-290.854000
82016-12-280.411000
92019-09-060.167000
102022-12-280.370000
112023-09-060.014000
122017-09-060.155000
132019-06-240.018000
142022-09-060.273000
152025-12-291.087000
162016-06-240.019000
172019-03-250.002000
182021-12-291.561000
192019-01-310.002000
202019-02-280.002000
212023-12-270.275000
222017-12-270.581000
232018-06-220.021000
242018-12-271.972000
252024-09-060.070000
262024-12-270.934000
272015-06-190.015000
282016-09-070.057000
292023-06-230.005000
302019-12-271.536000
312020-12-292.692000
322015-09-040.244000
332018-09-070.146000
342020-09-040.458000