A condition that describes the ability to execute orders of any size quickly and efficiently without a substantial affect on the price.

Liquidity can be described in terms of volume and open interest (abbr. OI). Each unit of volume represents a complete transaction. When one trader buys a contract and another trader sells the same contract, that transaction is recorded as one contract traded. Open interest represents the total number of contracts, either long or short, that have been entered into and not yet offset or fulfilled by delivery. Each open transaction has a buyer and seller, but for calculation of open interest only one side of the contract is counted. Volume and open interest are reported daily and are used by traders to determine the level of activity in a market for a given day or a price movement.


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  1. In some markets, e.g. grains, market fundamentals can change from one crop year to the next. Meanwhile, in other markets, such as energy, fundamental trends and changes can take years to emerge.

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