f/overrides/event-backup/gm-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

835 B

1DateDividends
22014-09-080.300000
32017-03-080.380000
42017-06-070.380000
52017-09-070.380000
62023-03-020.090000
72025-03-070.120000
82015-06-080.360000
92015-09-100.360000
102018-09-060.380000
112020-03-050.380000
122025-12-050.150000
132014-03-140.300000
142016-09-070.380000
152024-12-060.120000
162026-03-060.180000
172026-06-050.180000
182015-12-160.360000
192018-03-080.380000
202018-12-060.380000
212025-09-050.150000
222014-06-060.300000
232018-06-070.380000
242019-03-070.380000
252023-06-010.090000
262024-06-070.120000
272024-09-060.120000
282015-03-090.300000
292016-03-090.380000
302016-06-080.380000
312016-12-050.380000
322017-12-070.380000
332024-02-290.120000
342019-09-050.380000
352022-08-300.090000
362023-08-310.090000
372023-11-300.090000
382014-12-080.300000
392019-06-060.380000
402019-12-050.380000
412022-12-010.090000
422025-06-060.150000