Greece’s looming debt default has become the focal point for market angst in the past few days. Perhaps investors should be paying more attention to China, where the People’s Bank of China is trying to tame an increasingly volatile stock market and a deepening economic slowdown with ever-easier monetary policy. Tuesday was another roller-coaster ride for Chinese stocks. The Shanghai Composite Index closed up 5.5%, after falling more than 5%. It is down 17% from a June 12 high but has doubled over the past year. This is like the Dow Jones Industrial average veering between 17,000 and 18,900 in a single day and falling ... (full story)