Your client Ben is in his late 30s ( married, with two kids ) and working as a full-time doctor in ZZ hospital. He deposited all his money in the bank, but the interest rate is decreasing all the time. He heard that the return of stock investment is much higher. as he knows one medicine company very,well, he plans to open a stock account and invest all his money in that company first. Subsequently as he gets to know other medicine companies, he planned to diversify his portfolio into those companies. Appraise Ben's investment plan. ( Word limit - 200 words )