In the late 1980s, amid the seemingly unstoppable boom in Japan, Industrial Bank of Japan briefly became the biggest company by market value. Yet there's something China bulls can learn from the chastened Japan bulls of yesteryear - the dangers of loose monetary policy. Bankers had lots of money to lend and investors had lots of money to put into bonds or stocks, yet they chose not to. It was low rates that fueled irrational risk-taking in markets and allowed banks to make loans that wouldn't have been made if monetary policies were sound. read more