Suppose you buy stock in a company and find out that something disastrous happened that would drive the companies stock down the next day. How would you issue an order to immediately sell the stock the next day at the price the market last closed at? I've been paper trading for a few weeks and encountered this problem with take two (TTWO).

I suppose a stop order would work, but if there was any lag for the order to process, wouldn't it sell for a rock-bottom price?

Thanks in advance

The short answer is you are stuck, the stock will open lower and that will be the best price you could get. You could, if your broker allows, make an ECN offer after market or premarket the next day, but whoever is on the other side will know what you know and you're not likely to get your price.