The main topic of this paper is about the overall functionnning of the french futures bonds market. Three mains questions are asked: (1) Is the futures market inefficient? (2) Is there any free lunch between the future market and the spot market? (3) Does one of these markets play a leader role?...

To explain the existence of stop-loss rules in financial institutions, we develop a principal/agent model, where an investment firm (the principal) has to rely on the expertise of a trader (the agent) to invest in a risky asset (a future contract, say). When the trader faces a limited liability...