Holding strategic oil stocks is at first sight an obvious tool to address potential disturbances in supplies. Rationally defining the desirable size of stocks and designing rules for their predictable use is an elusive task, however. A key conceptual difficulty arises in the distinction between...

Using data from the Frankfurt Stock Exchange we analyze price formation and liquidity in a non-anonymous environment with similarities to the floor of the NYSE. Our main hypothesis is that the non-anonymity allows the specialist to assess the probability that a trader trades on the basis of...