f/overrides/event-backup/mxzhx-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

615 B

1DateDividends
22017-09-080.406000
32020-09-080.504000
42019-09-101.237000
52021-06-250.059000
62021-12-301.095000
72023-12-280.312000
82016-06-280.085000
92017-06-270.081000
102022-06-270.064000
112016-09-090.022000
122016-12-290.422000
132021-09-070.699000
142023-09-080.298000
152024-09-100.468000
162018-06-270.089000
172018-12-280.834000
182022-12-290.332000
192023-06-270.072000
202025-09-090.427000
212015-06-240.071000
222020-12-300.447000
232022-09-080.889000
242025-12-300.274000
252018-09-110.693000
262019-12-300.379000
272015-12-300.380000
282020-06-260.066000
292024-12-300.379000
302017-12-280.631000
312019-06-260.082000