I love it when people use the "as a..." as some sort of de-facto proof the plebs reading their post should take what they say as truth.
This paper will become a seminal work in economics quickly because it's making so many frauds mad.
For a corporate statistician you didn't even do
2 HONEST MINUTES of research. So I did it for you:
(b) You're wrong. See the attached photo - The markets for the last ~3 years or better (I only went that far) spent more time correlated than uncorrelated. Before you say "there are drops to negative correlation"! That is still significant correlation. Since this underpins your entire argument (which is a bad argument anyway -
correlation is not
causation) the rest of your post is invalid.
(c) You're wrong again. From (b) and my image linked the markets are highly correlated (|CC(20)| > 0.9 majority of the time). This even makes fundamental sense as we get a lot of softs from Brazil so naturally our economies are intertwined.
You seem to have no idea what an actual "representative sample" is (you've even managed to
screw up causation by implying market correlation relates to new day trader ability!) Do we throw out health data from Japanese studies because Americans are not Japanese? Are you kidding me "corporate statistician"? Was the auto-maker
Saturn?