请解释下方法②？

权益，reading31，原版书课后题第29题。行业平均PE是5.5，个股PE是8.3，这个计算没问题。但是，为什么个股市盈率高于行业市盈率，股票就是被高估的？

04.单选题 收藏 标记 纠错 Reduction in which of the following element will increase the efficiencies when comparing a barter economy with an economy that uses money as a medium of exchange? A The need to specialize. B Transaction costs. C Nominal interest rates. 查看解析 上一题 下一题 正确答案B 您的答案A本题平均正确率：64% Money creation process难度：一般 推荐：      答案解析 Money functions as a medium of exchange because it is accepted as payment for goods and services. Compare this to a barter economy, where if I have goat and want an ox, I have to find someone willing to trade. Finding someone takes time and time is costly. With money, I can sell the goat and buy the ox. Thus, transaction costs are reduced. Having money as a medium of exchange would not reduce the inflation rate, interest rates, or the need to specialize in the production of those goods in which we have a comparative advantage (low opportunity cost producer). 求中文讲解，视频没声音

02.单选题 收藏 标记 纠错 A development country maintains a fixed value for its currency relative to the U.S. dollar. It is experiencing a decline in its economic activity, and its inflation rate falls below the Level in the United States. If the developing country wants to maintain the fixed exchange rate target, its A Money supply will contract. B Short-term interest rates will fall. C Foreign exchange reserves will decrease. 查看解析 上一题 下一题 正确答案B 您的答案A本题平均正确率：50% Money creation process难度：一般 推荐：      答案解析 With a decline in economic activity and domestic inflation, the currency of the developing country would start to rise against the dollar. To protect the exchange rate target, the developing country‘s monetary authority will purchase foreign exchange reserves and sell its own currency. This action will increase the domestic money supply and decrease short-term interest rates. 问：通货膨胀降低为什么意味着本币上升啊？整条逻辑推到链可否简要用再讲解一下？

reading 18课后第2题 - 请问题目中只是说她低估了无形资产价值并不是摊销费用，但是无形资产价值并不影响earnings对吗？没有进行减值测试是对I/S里哪一项有影响

这道题不太明白，他都已经财政赤字了，DC下降还带来进口需要的钱多了出口得到的钱少了，那它怎么缓解财政赤字呀？

non-SRO是什么意思，算是监管者吗？

财政赤字为什么会带来资本账户盈余？

老师 问题b的答案解析看不懂 能否用中文讲解一下

第5题 不是持有5年吗 解题过程为什么只折现了4期