f/overrides/event-backup/gcow-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

815 B

1DateDividends
22020-09-210.512000
32020-12-210.292000
42021-03-220.246000
52022-12-220.381000
62025-03-060.064000
72017-09-260.263000
82020-03-230.215000
92021-09-230.610000
102022-09-220.459000
112026-06-040.419000
122024-03-210.346000
132016-09-130.116000
142017-12-270.225000
152019-03-260.321000
162019-06-250.282000
172019-12-240.348000
182020-06-220.162000
192021-12-230.283000
202024-12-270.355000
212025-09-040.283000
222017-03-280.173000
232017-06-270.218000
242018-06-260.244000
252018-12-240.257000
262022-03-240.268000
272022-06-230.284000
282023-03-230.157000
292018-03-270.223000
302023-09-210.792000
312016-12-280.228000
322021-06-210.192000
332016-06-140.179000
342023-12-270.282000
352025-06-050.321000
362018-09-250.377000
372023-06-220.580000
382024-06-270.717000
392024-09-260.316000
402025-12-301.005000
412026-03-050.422000