Quote from smilingsynic:
The fact is that a significant portion of the gains/losses in a period--over the LONG HAUL, not just a few months--come from overnight holding.
And my study showed the same, 30% is a signifficant portion.

But you said in your first post that the BIGGER part of the movement comes from overnight gaps, and last time I checked 30% was still less than 51%...
Now what happened back in the early 90s is not a concern of mine, markets change and so should strategies....