f/overrides/event-backup/mcsax-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

315 B

1DateDividends
22020-12-100.038000
32021-12-092.393000
42025-12-090.571000
52010-12-160.017000
62013-12-120.026000
72016-12-150.022000
82017-12-140.173000
92018-12-130.164000
102023-12-190.065000
112024-12-100.108000
122011-12-151.942000
132012-12-130.064000
142019-12-120.091000
152022-12-081.031000
162015-12-150.003000