I cringe every time I read something similar to this. Full Disclosure I'm not an investment pro, but I have invested for myself over the past 5yrs, and have a compounded avg return in the neighborhood of 20% after tax. I studied investing for about 10 years independently before I began investing on my own, I paper traded for 2 years before I used real money. I say all this to let you know there is much to learn, and that investing is like having a second job for me. If you don't take it that seriously you are bound to do worse then the indexes, and will probably suffer permanent impairment of your capital at some point. To make money you have to have a divergent view from the crowd, and do independent research. You also have to know what you are buying, and have a view of what the fractional interest in that business is worth. In my opinion you should sell not because of the news, but because you have no idea what the company is worth or whether it is headed for bankruptcy. If you want to make money in the stock market you have essentially 2 options, you can go the DIY route, which takes a long time to aquire the knowledge, and even then you will operate with handicaps compared to the institutional guys. Or you can pay some one to do it for you, hedge fund, index fund etc... I do both, but the majority of my money is indexed, because my other job takes a lot of time.