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Somewhere I read or picked up in the environment that "value" is a "Marxist" notion (and therefore, "non-economic" and "illegitimate") and that "price" is a capitalist notion. But equity and commodity traders continually seek "undervalued" shares and commodities, meaning shares and commodities for which "the market" has cleared prices below their "true" value. Also, there isn't a unitary "market" but many mechanism designs for clearing prices. Otherwise, there would be only one thing to learn.
Wasn't that boring?
@flengyel No, actually! Made me think that value=discounted expected price (ofc very different from the Marxist notion)
The difference between value and price, recognized by traders, institutions, market makers, etc., attempting to make a buck on the market, has spawned individual theories for determining the value of equities, options, commodities, etc., as opposed to their price (such theories are sometimes known as the trader's "edge") and methodologies for not losing your shirt (risk management). Both are needed.