Very well done look at market timing, but I think you should push the timing harder. Your surprising results for missing the best days by the month and the year are a result of missing bear market entirely.

I'm going to have a somewhat faulty old-man memory here, which I shouldn't because it heavily influenced me, but I recall I read an article similar to this in I believe IBD years ago that also advocated not timing the market for most people but way down in the piece there as a paragraph (so far down hardly anyone would read it) that noted missing the 10 worst days in the market massively outperformed everything. To my mind that was when market timing really mattered.

If you have the historical data for that alternative and chose to write it up, I'd love to read that too.