The path towards creating a worldvolatility have now reached the stage of an assetportfoliovolatility. The portfolio assets are :US 10 year treasuries, NASDAQ and gold. The portfolio is risk parity weighted and weekly rebalanced to capture actual experienced voll by the biggest asset managers in the world.
The last little increase looks small but captures the uptick in volatility after Brexit. The next phase towards worldvolatility will be some method to capture changing monetary regimes, with the China SDR inclusion in late 2016 being an example of a change of this type.