Suction is the production of a more or less complete vacuum with the result that atmospheric pressure forces fluid into the vacant space (OED definition)

To what extent did the big down moves in such markets as gold, Russia, Spain (down 24% on year), Italy (down 15% on year) and Europe cause the decline with a lag in US stocks. Is there a general phenomenon with which suction can predict declines in closely related geographic areas? How does the concept of substitute good enter into the fray. A substitute is defined as a good whose price rises as the other good rises  A complementary good is one whose price declines as the price of the other good rises. Are bonds a substitute for stocks? The dollar? What are the predictive relations?

Gary Phillips comments: 

It seems many of the moves and traditional correlations occur without much logic behind them and have little to do with valuation fundamentals but rather with the tactical games the liquidity providers play.

Also, country ETFs emerged as an asset class and this has contributed to increased price volatility.

Similar phenomena were seen with commodities whose financialization led (see Tang & Xiong, 2010) to increased price volatility of non-energy commodities and an increased correlation to oil.

Another factor to consider may be global QE policies. Each country that adopts QE [Quantitative Easing] creates mispricings in assets and goods & services; however, the Central Banks have no control over which assets are inflated, to what degree they are inflated, or in which countries they are inflated in.





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