f/overrides/event-backup/jdvzx-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

875 B

1DateDividends
22020-12-151.299000
32021-12-310.059000
42022-12-150.725000
52024-03-280.062000
62024-12-310.152000
72025-09-300.151000
82018-06-290.133000
92019-09-300.075000
102025-12-310.127000
112018-12-141.285000
122021-12-152.828000
132019-12-310.102000
142020-03-310.068000
152022-12-300.056000
162018-03-290.073000
172019-06-280.119000
182025-12-151.712000
192021-03-310.064000
202023-06-300.087000
212021-06-300.085000
222023-03-310.065000
232024-09-300.096000
242026-03-310.071000
252018-12-310.123000
262020-06-300.086000
272021-09-300.164000
282023-09-290.015000
292025-06-300.122000
302018-09-280.058000
312019-12-161.168000
322022-06-300.070000
332022-09-300.038000
342024-06-280.102000
352017-12-290.113000
362020-09-300.086000
372020-12-310.091000
382022-03-310.030000
392023-12-290.041000
402024-12-160.232000
412025-03-310.081000
422026-06-300.110000
432017-12-150.880000
442019-03-290.085000