f/overrides/event-backup/ltpz-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
2018-11-01,0.160000
2022-02-01,0.330000
2009-12-16,0.003000
2009-12-29,0.113000
2019-12-30,0.310000
2020-11-02,0.190000
2022-09-01,0.900000
2024-09-03,0.040000
2011-08-31,0.040000
2015-12-29,0.052000
2023-12-01,0.170000
2024-06-03,0.470000
2024-08-01,0.120000
2010-12-29,0.090000
2014-09-30,0.020000
2024-12-31,0.100000
2021-12-30,0.380000
2023-04-03,0.210000
2017-12-28,0.227000
2023-07-03,0.360000
2010-10-29,0.114000
2011-10-31,0.180000
2019-12-02,0.200000
2022-06-01,0.850000
2024-05-01,0.360000
2025-12-31,0.200000
2012-04-30,0.200000
2019-09-03,0.060000
2017-05-01,0.200000
2018-04-02,0.300000
2018-06-01,0.190000
2019-07-01,0.200000
2023-10-02,0.120000
2025-06-02,0.190000
2015-07-31,0.150000
2016-12-01,0.250000
2020-10-01,0.300000
2021-04-01,0.240000
2021-08-02,0.480000
2021-09-01,0.500000
2022-08-01,0.650000
2010-01-29,0.112000
2020-09-01,0.250000
2021-11-01,0.080000
2011-07-29,0.264000
2021-06-01,0.410000
2017-12-01,0.300000
2022-03-01,0.200000
2025-09-02,0.240000
2012-05-31,0.400000
2013-10-31,0.120000
2017-09-01,0.090000
2024-11-01,0.080000
2012-12-27,0.100000
2014-04-30,0.120000
2018-05-01,0.300000
2018-07-02,0.240000
2022-07-01,0.360000
2024-10-01,0.090000
2010-06-30,0.185000
2012-06-29,0.200000
2015-09-30,0.050000
2011-03-31,0.271000
2013-06-28,0.060000
2021-10-01,0.220000
2021-12-01,0.130000
2023-09-01,0.210000
2025-07-01,0.230000
2025-12-01,0.200000
2026-08-03,0.460000
2013-07-31,0.100000
2017-07-03,0.240000
2025-05-01,0.330000
2026-07-01,0.630000
2016-08-01,0.300000
2019-08-01,0.180000
2011-11-30,0.128000
2017-11-01,0.160000
2023-08-01,0.150000
2025-03-03,0.030000
2010-03-31,0.221000
2018-08-01,0.250000
2011-01-31,0.101000
2023-06-01,0.240000
2016-12-28,0.600000
2018-12-28,0.465000
2021-05-03,0.320000
2023-11-01,0.290000
2025-08-01,0.170000
2009-11-30,0.118000
2010-08-31,0.032000
2017-06-01,0.060000
2018-09-04,0.145000
2020-05-01,0.170000
2022-05-02,0.630000
2025-10-01,0.140000
2010-02-26,0.007000
2010-04-30,0.096000
2013-08-30,0.270000
2017-08-01,0.080000
2024-12-02,0.130000
2026-05-01,0.530000
2010-05-28,0.229000
2016-09-01,0.360000
2014-06-30,0.320000
2014-07-31,0.240000
2019-10-01,0.150000
2025-04-01,0.450000
2009-10-30,0.168000
2011-05-31,0.508000
2013-05-31,0.060000
2011-06-30,0.377000
2011-09-30,0.092000
2012-11-30,0.120000
2025-11-03,0.220000
2011-04-29,0.275000
2012-03-30,0.080000
2015-08-31,0.180000
2020-12-01,0.060000
2010-07-30,0.110000
2010-11-30,0.092000
2026-06-01,0.700000
2023-05-01,0.350000
2024-04-01,0.280000
2020-04-01,0.290000
2022-04-01,0.530000
2026-04-01,0.020000
2009-09-30,0.009000
2013-11-29,0.050000
2014-05-30,0.300000
2019-11-01,0.150000
2014-08-29,0.150000
2017-04-03,0.200000
2022-12-01,0.120000
2022-12-29,0.310000
2024-07-01,0.260000
2010-09-30,0.077000
2013-09-30,0.070000
2018-12-03,0.320000
2021-07-01,0.490000
2011-02-28,0.128000
2014-12-29,0.040000