We study an economy where there are two types of assets. Consumers' promises are the primitive defaultable assets secured by collateral chosen by the consumers themselves. The purchase of these personalized assets by Â¯- nancial intermediaries is Â¯nanced by selling back derivatives to consumers. We show that nonarbitrage prices of primitive assets are strict submartin- gales, whereas nonarbitrage prices of derivatives are supermartingales. Next we establish existence of equilibrium, without imposing bounds on short sales. The nonconvexity of the budget set is overcome by considering a continuum of agents
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Finance Lab Working Papers
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"Collateral Avoids Ponzi Schemes in Incomplete Markets,"
Econometric Society, vol. 70(4), pages 1613-1638, July.
- Páscoa, Mario Rui & Araújo, Aloísio Pessoa de & Torres-Martínez, Juan Pablo, 2001. "Collateral Avoids Ponzi Schemes in Incomplete Markets," Economics Working Papers (Ensaios Economicos da EPGE) 419, FGV/EPGE Escola Brasileira de Economia e Finanças, Getulio Vargas Foundation (Brazil).
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