Once upon a time, there's a closed-end mutual fund that happens to have the ticker symbol, CUBA. Now, closed-end funds have been studied for many years. They're a special kind of mutual funds where the shares of funds are traded in stock exchange and the price of the shares can deviate from the value of net assets (NAV) that they own, which are also traded securities in capital markets. For this particular fund, although it has the ticker symbol CUBA, its holdings of Cuba are zero because it cannot invest in Cuba. First, that would be illegal and second, there are no securities in Cuba. For many years, CUBA has been traded at a discount of about 10 to 15% of net asset value, meaning that you could buy a hundred dollar worth of their assets for $85 to $90, which is a good bargain. Then, if we look at the chart below, all of the sudden, one day, the price skyrockets, and it sells for a 70% premium, and on that day President Obama announced his intention to relax relations with Cuba, so for a bunch of securities you could buy for $90 on one day, it cost you $170 the next day.

What is the moral of this story?