To liquidate means to convert into cash in the conditions of an open market.
Market value is the value of the product that would be assigned to it should it enter the market.
An offsetting change in margin account, made in the span of one trading day, that results in no overall change in the account value is called same-day substitution. When it is made, there is no need for generating a margin call.
Delivery is the action of transferring a commodity, currency, cash or another trading asset which is the subject of sales contract, is tendered to and is received by the buyer of said asset. Delivery can be deemed finished only when the asset is received by the buyer.
Regret avoidance is a theory that works off of the traders’ refusal to admit their failure in investment decision. In other words, refusal to admit poor and possibly failed investment that led to losses.