case 1：2015 CFA3 Morning session Q11 partA
Client 1的behavioral bias是regret-aversion，根据题目答案，在Uno Inc.从55上涨到66后，他的选择是“take no action”，题目的解释是“...tend to avoid making decisions out of fear...”
case 2：2017 CFA3 Morning session Q5 PartC
Client 4的behavioral bias是regret-aversion，根据题目答案“buying equities as market rises is consistent with...” ，题目的解释是“herding...believe they are potentially missing out on profit opportunities...”
所以在市场上涨的过程中，regret-aversion bias到底应该选择take no action，还是应该选择buy more shares？
