But no one could have successfully predicted just when the euro would appreciate, or that it would first fall to almost 80 cents, although the pattern of momentum in the short run and mean reversion in the long run is a common feature of speculative marke
But no one could have successfully predicted just when the euro would appreciate, or that it would first fall to almost 80 cents, although the pattern of momentum in the short run and mean reversion in the long run is a common feature of speculative marke
然而，尽管短期动量型态与长期回归平均趋势是`所有投机性市场的—个共同特征，但没有人曾成功预知欧元何时升值，或者预见欧元兑美元汇率会先跌至近80美分的水平。