What differentiates a merchant from other economic agents (such as a “producer”) is that his natural response to “outside” influences is to vary the size of his stock—to absorb stocks in the face of excess supplies and to release stocks in the face of excess demand. The merchants’ function in other words is to create and preserve an “orderly” market which they can only do through their willingness to act as a shock-absorber: through their readiness to enlarge their commitments when prices are sagging and to curtail commitments when they are rising. The very notion of “merchanting” or “commercial” activities involves therefore the assumption that there is a certain elasticity of demand for
holding stocks by the traders: an elasticity which is ultimately governed by the traders’ expectations concerning prices and selling opportunities in the future.
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