My stock idea for today has a great-looking chart, good earnings growth and a fine story. Which means there must be a “Yes, but …” attached. True. The company is Cninsure (CISG), a fast-growing China-based insurance broker that offers property, casualty and life insurance in 21 Chinese provinces. The company was founded in 1998, just as the Chinese private sector was really powering up. Before the switch to capitalism, the Chinese state didn’t have any use for insurance; everything belonged to the state and the state was committed to taking care of people from cradle to grave. But people...