f/overrides/event-backup/fmtzx-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

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Date,Dividends
2012-09-26,0.048000
2015-03-27,0.037000
2021-12-30,1.763000
2023-09-29,0.078000
2007-03-12,0.051000
2013-03-26,0.040000
2016-03-29,0.005000
2023-06-30,0.087000
2023-12-28,0.068000
2012-06-27,0.048000
2006-03-13,0.047000
2009-03-31,0.054000
2010-12-29,0.146000
2012-12-28,0.236000
2018-03-27,0.003000
2022-03-31,0.013000
2025-09-30,0.088000
2005-12-29,0.180000
2019-06-26,0.123000
2020-09-28,0.051000
2008-03-31,0.051000
2009-06-30,0.131000
2010-09-28,0.064000
2007-06-08,0.074000
2008-12-29,0.187000
2010-03-29,0.040000
2017-06-28,0.138000
2020-03-27,0.039000
2021-09-28,0.050000
2006-06-15,0.063000
2014-03-27,0.039000
2021-06-28,0.303000
2022-06-15,0.380000
2012-03-28,0.066000
2016-06-28,0.211000
2017-03-29,0.078000
2020-12-30,0.246000
2026-03-31,0.038000
2011-09-28,0.067000
2011-06-28,0.047000
2019-03-27,0.047000
2020-06-26,0.405000
2022-09-30,0.058000
2022-12-29,0.070000
2025-12-30,0.706000
2006-09-15,0.081000
2013-06-26,0.302000
2025-06-30,0.105000
2006-12-28,0.226000
2025-03-31,0.069000
2023-03-31,0.083000
2014-06-26,0.262000
2017-12-28,0.791000
2018-06-27,0.177000
2018-12-28,1.016000
2019-09-26,0.063000
2024-06-28,0.087000
2011-12-28,0.159000
2009-09-28,0.073000
2011-03-29,0.082000
2013-09-26,0.047000
2014-09-26,0.042000
2015-06-26,0.438000
2015-09-28,0.074000
2015-12-30,0.432000
2008-09-30,0.062000
2026-06-30,0.504000
2022-06-30,0.063000
2023-06-15,0.093000
2024-03-28,0.090000
2024-12-30,0.139000
2025-06-16,0.530000
2010-06-28,0.041000
2013-12-30,0.506000
2014-12-30,0.421000
2018-09-26,0.133000
2019-12-30,1.220000
2021-03-29,0.006000
2024-09-30,0.076000
2008-06-30,0.079000
2007-12-28,0.263000
2009-12-29,0.109000
2016-12-29,0.155000
2007-09-17,0.079000