There is no guarantee that an exchange-traded contract would be a liquid one.

交易所交易合约也未必一定具有很好的流动性。

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Futures contract: A standardized contract, traded on a futures exchange, to buy or sell a certain underlying instrument at a certain date in the future, at a specified price.

期货合约：在期货交易所交易的标准合约，它规定了在未来的日期以规定的价格买卖一定数量的商品。

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For example, MCX designed a small 5-ton contract for copper versus the 25-ton contract that is traded on the London Metal Exchange.

FORBES: Magazine Article

In the case of the most-active copper contract traded on the Comex division of the New York Mercantile Exchange, Tuesday was the first rise in nine trading sessions, although volume was small with electronic activity only as trading floors remained closed due to Hurricane Sandy.

FORBES: Base Metals Slide In Recent Weeks On Demand Worries; Better Days Seen Ahead

The most-active June gold contract traded on the Comex division of the New York Mercantile Exchange is headed for its seventh straight down day.

FORBES: UPDATE: Stronger Dollar, Technical Weakness Push Gold Futures To Six-Week Low