问题如下：
Based on Exhibit 1, Alvarez finds that an arbitrage opportunity is:
选项：
A.not available.
B.available based on the dominance principle.
C.available based on the value additivity principle.
解释：
B is correct.
Based on the dominance principle, an arbitrage opportunity exists. The dominance principle asserts that a financial asset with a risk-free payoff in the future must have a positive price today. Because Asset A and Asset B are both risk-free assets, they should have the same discount rate. Relative to its payoff, Asset A is priced at $500/525, or 0.95238, and Asset B is priced at $1,000/1,100, or 0.90909. Given its higher implied discount rate(10%) and lower corresponding price, Asset B is cheap relative to Asset A, which has a lower implied discount rate (5%) and higher corresponding price.
The arbitrage opportunity based on dominance is to sell two units of Asset A for $1,000 and buy one unit of Asset B. There is no cash outlay today, and in one year, the portfolio delivers a net cash inflow of $50 [= $1,100 – (2 ×$525)].
老师好 这题是否additivity arbitrage (payoff 一样，比较price) 也可以有？ 就是用
(1100/525)*500-1000=47? 如果不可以，为什么不可以？ 谢谢。
