The purpose of this paper is twofold. First, it introduces a new version of the Edgeworth process with trading activities centered around self-interested enterprising arbitragers; and second it examines how the prices of the derived securities are deteremined under this process.

The use of collateral has become one of the most widespread risk mitigation techniques. While it brings stabilizing effects to the individual lender we argue that it may exacerbate systemic risk through margin call activation. We show how a liquidity shock to the cash lender may propagate as a...