Therefore it is necessary for us to study the option pricing problem when the stock returns have long-range dependence and momentum effect.
因此我们有必要研究股票收益具有长期依赖性及动量效应时的期权定价问题。
You must have long-range goals to keep you from being frustrated by short-range failures.
你必须有长远的目标，以避免因短暂的失败而丧气。
You must have long-range goals to keep you from being frustrated by short-range failures.
你必须有长远的目标，以避免因短暂的失败而丧气。
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