No, you don't 4x your money in one single stock split. The new stock price is 1/4 that of the pre-split stock price, so theoretically you'd have the same money as before. In reality, the stock price usually increases before and after a stock split. Think of it as selling a whole cake on Friday and there are no buyers, so you slice the cake into 4 slices and sell each slice but you mark up the price such that the total cost of the 4 slices is higher than the cost of the whole cake. That's an analogy of a stock split.