-Ars Firma trades 27 liquid markets all six market sectors: foreign exchange, interest rates, energy, agricultural commodities, metals and stock indices. Each trade specifies its own predefined level of monetary risk, and profit objective; the overall trading objective is both return and control of portfolio exposure. No attempt is made to capture large moves in markets. The methodology’s iterative process tends to cause a repetition of a series of profits and losses in the totality of markets (with profits designed to be incrementally larger than the losses). The portfolio thereby resembles an actuarial exercise in practice. Trading results over any short term are random, but over time frames of increasing duration the methodology’s underlying principles create an aggregation of small losses likely to be more than offset by an incrementally larger aggregation of gains.The accompanying data for 2008-2009 are results of real-time trading in a proprietary account. All trades in Ars Firma were executed in the proprietary trading account, with the 2008-2009 extracted performance drawn from the allocations called for in an Ars Firma account. All performance is net of fees.