f/overrides/event-backup/abnax-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
2010-07-16,0.014000
2024-04-03,0.054000
2018-11-07,0.008000
2011-03-16,0.029000
2013-12-12,0.016000
2018-12-07,0.054000
2019-12-06,0.042000
2022-01-05,0.006000
2023-11-08,0.056000
2025-07-09,0.045000
2011-01-13,0.012000
2017-07-12,0.020000
2018-03-07,0.001000
2018-06-06,0.043000
2022-12-07,0.085000
2010-08-16,0.005000
2025-12-03,0.066000
2014-05-12,0.044000
2014-11-11,0.002000
2017-09-06,0.019000
2011-04-13,0.071000
2019-05-08,0.024000
2020-05-06,0.007000
2021-05-05,0.057000
2016-07-12,0.050000
2011-05-12,0.043000
2018-10-10,0.022000
2025-01-08,0.006000
2025-06-04,0.032000
2026-07-08,0.091000
2010-06-17,0.027000
2018-08-08,0.032000
2025-03-05,0.022000
2016-12-09,0.044000
2017-08-09,0.025000
2022-02-09,0.029000
2025-08-06,0.030000
2012-12-13,0.010000
2022-04-06,0.056000
2025-09-10,0.044000
2026-08-05,0.051000
2020-08-05,0.012000
2023-12-06,0.030000
2024-05-08,0.077000
2022-09-07,0.089000
2017-05-10,0.015000
2011-06-15,0.076000
2012-06-13,0.055000
2013-09-12,0.011000
2014-06-09,0.044000
2011-11-10,0.017000
2020-12-09,0.037000
2022-06-08,0.115000
2025-02-05,0.011000
2025-05-07,0.046000
2026-03-04,0.005000
2014-12-12,0.053000
2023-04-05,0.069000
2024-06-05,0.063000
2016-09-07,0.023000
2020-10-07,0.087000
2021-08-11,0.073000
2023-06-07,0.049000
2014-07-11,0.030000
2012-11-13,0.018000
2018-09-12,0.023000
2023-10-04,0.029000
2024-02-07,0.006000
2011-10-13,0.008000
2018-07-11,0.050000
2024-12-04,0.045000
2011-07-14,0.046000
2015-12-11,0.071000
2016-10-04,0.018000
2017-12-08,0.036000
2018-05-09,0.025000
2019-07-10,0.049000
2023-03-08,0.004000
2023-05-03,0.053000
2013-10-11,0.002000
2026-04-08,0.034000
2023-08-09,0.043000
2024-07-03,0.046000
2011-08-11,0.018000
2022-07-06,0.043000
2022-11-09,0.003000
2024-10-09,0.025000
2025-11-05,0.035000
2021-09-08,0.056000
2013-11-12,0.002000
2015-08-12,0.018000
2015-09-09,0.023000
2016-08-09,0.039000
2019-09-11,0.031000
2020-04-08,0.026000
2020-09-09,0.047000
2013-08-13,0.015000
2024-09-11,0.027000
2024-08-07,0.037000
2019-04-10,0.001000
2017-06-07,0.021000
2022-08-10,0.105000
2023-01-04,0.007000
2024-03-06,0.015000
2024-11-06,0.021000
2016-06-07,0.005000
2013-05-10,0.014000
2014-04-08,0.005000
2017-03-08,0.005000
2010-12-15,0.010000
2021-04-07,0.041000
2021-06-09,0.065000
2021-12-08,0.116000
2022-05-04,0.074000
2023-02-08,0.010000
2023-07-05,0.052000
2017-04-05,0.027000
2012-05-11,0.046000
2018-04-11,0.016000
2022-03-09,0.031000
2025-10-08,0.025000
2010-11-15,0.016000
2017-11-08,0.008000
2021-03-10,0.026000
2021-07-07,0.061000
2025-04-09,0.077000
2014-08-13,0.026000
2012-07-13,0.009000
2017-10-04,0.012000
2020-03-04,0.009000
2023-09-06,0.037000
2012-04-11,0.011000
2011-02-16,0.015000
2018-06-29,0.043000
2019-06-05,0.032000
2019-08-07,0.011000
2019-10-09,0.038000
2026-06-03,0.085000
2010-05-19,0.025000
2026-05-06,0.050000
2021-10-06,0.036000