Aaron Back says this time China is likely to feel the effects of the volatility in the stock markets. The surge in the stock markets added about half a percentage point to GDP growth in the 1st quarter of 2015, according to Capital Economics. GDP growth in the 1st quarter 2015 was 7%. Capital Economics says removing the boost from the stock market to a sluggish economy would mean a loss of 1 percentage point in GDP growth. Equity issuance was one way China hoped to reduce high debt levels at companies, and that avenue would the be that much harder to access to reduce debt levels. Margin financing is about $354 billion, or 3.5% of GDP according to Goldman Sachs, posing another source of problems and potentially affecting growth if stock losses lead to defaults. Declining investor sentiment and confidence in management of the economy would be another casualty in this situation. Only 10% of Chinese households own stocks compared to 50% in the U.S., yet Aaron Back says the effects of this are likely to be felt in lower economic growth and shaken confidence in the economy....