They "proved" that US tech stocks did better than portfolios with less US tech stocks over a recent, very short time range. 1. You didn't know that? 2. Whata re you going to do with this "new information"?
As a stock-trading exercise? Nothing, as you note. As an AI investigation it says plenty. Which is the point I was making (and got missed by all those stock-trading self-appointed experts who fastened onto that)
