问题如下：
Judy, a financial analyst, met three important clients and talked about their investment strategies separately this morning. Below are their conservation records.
Client 1: I experience different kinds of market conditions and have a very successful investment history. I always use my past experience to deal with similar information and adjust the expected returns of the company's stock, especially when the material public information is released.
Client 2: I prefer to use long option during the investment, because in my opinion long option position gives me excess returns with small risk. I am sure it has low probability of loss and will invest more long option products in the future.
Client 3: My parents educated me that money does not come easily, therefore I have followed a strict budget schedule since my first job. I keep this habit even in difficult times, and I can delay large spending and save more money for future.
Which client is mostly like to be consistent with the expected utility theory?
选项：
A. Client 1.
B. Client 2.
C. Client 3.
解释：
C is correct.
考点：传统金融学VS行为金融学
解析：Expected utility theory属于传统金融学范畴。Client 3 的描述与expected utility theory相符，因为这个客户有预算规划，为了达到自己的长期目标即使在艰难时期也严格执行，所以对这个人的描述是最接近理性和预期效用最大化的，这是传统金融学的假设基础。
Client 1用过去的经验处理新的信息，典型的套模板，是一种行为偏差，属于行为金融学范畴。
Client 2高估了期权获得收益的概率，低估了损失的概率。事实上，期权的风险很大，期权费(option premium)也很高。这也是行为偏差，属于行为金融学范畴 。
什么是expected utility?