Problem
Person A, Person B and Person C own stock in the same company. All of them are loss averse and have the same value function: v(x) = x for gains and v(x) = -2x for losses. The stock's price is shown below
October = 100
November = 90
December = 110
January = 70
February = 50
March = 80
Person C bought the stock in January. They expect to derive a value of at least +5 in April as compared to their reference point of 80. What is the minimum price that the stock will need to have in March to fulfill C's expectations?