For Paula and DelphcOracl, Consider a key lies in the fact
that yes, various features of markets have and do change,
but price behaviors reflect the behavior of people. And
the basic behavior of people has not changed since we emerged
from the caves. I believe this accounts for much of the
resemblance between wheat price charts hundreds of years ago
and stocks prices today -- bubbles and all. They are
man-made.
Cheers,
tol(Maury)