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The paper describes the behavior of financial markets as functions of the variables ``price return'' and ``time'' based on the net difference between ask and bid volumes over a unit period, thereby suggesting that at least a negative non-trivial price return extreme exists for a unit period. This admittedly heuristic approach also offers a method for approximating these negative price return extremes...
This paper proposes a variance-based spillover impact analysis embedded with a dynamic Kalman filtering in order to detect a causality relationship from the US stock markets into the European and emerging stock markets during the financial crisis. It has mainly two new contributions to the literature. Firstly, it uses variance rather than returns to analyze the spillover impact between the markets...
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