If their value rises a lot faster than GDP, that either suggests investors expect the GDP growth rate to rise substantially (unlikely in a mature economy), or that the assets are overvalued.

• 如果它们升值的速度比GDP快很多，或者意味著投资人预期GDP增长率将显著提高(发生在成熟的经济体的可能性极低)，或者意味著这些资产被定价过高。