Investors looking for growth stocks that can make dramatic moves in a short time should look more closely at healthcare. Two stocks in this sector have already doubled this year and could climb much higher.

Viking Therapeutics (NASDAQ: VKTX) and Nano-X Imaging (NASDAQ: NNOX) are each up more than 100% this year, and analysts on Wall Street think they have a lot more fuel in the tank. The average price targets on these two stocks suggest they can climb as much as 55% and 87%, respectively, over the next 12 months. 

It costs investment banks nothing to change the price targets they issue. This makes it a bad idea to buy stocks simply because analysts have high expectations, but that doesn't mean you should ignore their recommendations. Here's what you should know before making a decision to buy, sell, or hold these stocks.

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Source Fool.com