I once ran across the comment that if you simply predict tomorrow's weather will be the same as today's you'd be correct 80% of the time. Not sure how true that is (can't find the source).

Allegedly momentum investing does pretty well:

* https://en.wikipedia.org/wiki/Momentum_investing

(I'm more of an index guy myself.)

Years ago, My daughter's science teacher said that school should teach a love of learning.

I replied 'I thought the point of school was to make productive worker units in society'

And while he explained to me why I was wrong I was thinking to myself 'great, now he thinks I'm a terrible person'

It seems I deadpan too effectively.