Based on your financial expertise, provide your response or viewpoint on the given financial question or topic. The response format is open.

Is it prudent to sell a stock on a 40% rise in 2 months
Did you buy near the bottom? Suppose you did then the price is still 16% below. 50% fall and then 40% increase leaves a 16% gap. So there could still be upside. However, it appears that you are talking about a small-cap that is volatile. I wouldn't hold it. I would take the money and invest elsewhere. If you have a lot of shares and brokerage is less then sell 60% now and the remaining 40% on either 10-15% jump in price or if it falls by 5% from now. Too risky to hold longer-term.