With Americans being less and less interested in the safe haven of gold (as US shares keep rising) speculators are dumping gold and pumping up the price of US shares.
But is the share Bull Run irrational exuberance? What ever it is - it's papering over the cracks in the US economy - not solving deep-rooted problems like a National Debt to GDP ratio of 107:100 (which retards growth) and accumulated Federal debts and unfunded liabilities from Reagan to Obama that total $1,091,759 per US taxpayer that debauches the USD.
What the US Bull Run in share prices (not share yield) also papers over is: There is no minimum wage or a Fair Work Australia in America. Hence 4 US workers in a family that get $6.00 an hour can't afford to pay rent and buy food. So 48 million Americans (at vast public expense) rely on Food Stamps. This welfare reliance (due to mean bosses) is made worse by Big Biz sending millions of US jobs to coolie-wage lands that pay meaner rates than $6.00 an hour. This means 25 Americans are jobless and incapable of the consumption that's needed to increase production that's needed for a recovery.
Apart from speculative share punting, there is no Bull Run for many ordinary Americans, nor can there be until Americans have a legislated minimum wage of $16 an hour, like OZ has.