The valid reason for selling the stock now is that the -Courtney is concerned that the value of the stock will decline in the near future.
Explanation:
Courtney has invested in RAD, Inc. stock nine months back .Now she is considering tax planning strategies at the end of the year and is pondering whether or not to sell her investment in the stock.
A friend has advised Courtney that she should hold the stock for at least three more months in order to have a long-term holding period. but the consideration of Courtney that the value of the stock will decline in the near future is the reasons why she was to sell the stock at the earliest despite taking her friends advice
