金融里marked to market 是什么意思？

一般该术语在期货中出现，即
Futures are margined daily to the daily spot price of a forward with the same agreed-upon delivery price and underlying asset.
期货每天都会以当天市场上，具有同样的标的货物和远期成交金额、时间的远期合约价格的市场价值来衡量。
Mark to market一词源于会计术语，原意为用现在的市场价值来衡量一项资产的价值。在期货中使用这一规则是为了满足在交易所连续交易的需要，也减少了违约风险。

逐日盯市制度（Market-to-Market）其原则是：结算部门在每日闭市后计算、检查保证金账户余额，通过适时发出追加保证金通知，使保证金余额维持在一定水平之上，防止负债现象发生的结算制度。
英文解释是：
To record a change in the value of an asset or fund to reflect its current fair market value. Marking to market occurs on a daily basis and is used for a number of purposes. Notably, investors mark to market a portfolio or security to ensure that a margin account is meeting its minimum maintenance.

逐日盯市制度（Market-to-Market）

全句是as soon as a futures contract is marked to market,its value is zero.
逐日盯市制度（Market-to-Market）