f/overrides/event-backup/mrgr-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

775 B

1DateDividends
22013-03-200.012000
32016-12-210.210000
42021-09-220.109000
52023-06-210.117000
62024-06-260.009000
72025-12-241.003000
82026-06-240.087000
92015-03-250.026000
102017-12-260.030000
112018-06-200.064000
122023-09-200.105000
132026-03-250.089000
142014-12-220.194000
152015-12-220.076000
162018-09-260.445000
172019-12-240.216000
182013-09-250.038000
192018-12-260.005000
202023-03-220.050000
212023-12-200.578000
222017-09-270.101000
232022-12-220.237000
242024-12-231.146000
252025-06-250.085000
262025-09-240.214000
272013-12-240.301000
282016-06-220.055000
292019-06-250.035000
302019-09-250.048000
312021-03-230.091000
322024-09-250.073000
332025-03-260.132000
342014-03-260.049000
352021-06-220.015000
362021-12-230.030000
372024-03-200.086000
382013-06-260.574000
392015-06-240.022000