If you are wondering what triggered the PBOC to pull the punchbowl of leveraged collateral away from the ‘wealth-creating’ stock market exuberance in China… wonder no more. The last 2 weeks saw the biggest surge in new Chinese brokerage accounts ever, with this week alone the highest since October 2010 and January 2008 with a stunning 228,000 new accounts opened. On both prior occasions of such a maniacal surge in speculative accounts, the Shanghai Composite made a significant top and fell dramatically in the ensuing months.