Instead, in the days ahead, I feel that earnings will play a far more significant role in directing the fund's performance. While the earnings results from top media companies will make PBS an exciting fund to watch over the course of second half of this week, it is important to note that investing in this product is not an ideal strategy for everyone. On the contrary, because it is dedicated to tracking such a small segment of the marketplace, it tends to behave in a volatile manner. Cautious investors, wary of seeing steep rises and falls on a day to day basis may find a more-heavily diversified option more to their liking. By keeping exposure small and focused, it is possible to mitigate some of the risks inherent of this fund. The media industry could see strength during the next few days. However, any investor trying their luck with PBS will require a strong stomach and plenty of patience. Written by Don Dion in Williamstown, Mass.