When a stock looks like it's on sale, the temptation to buy a handful of shares can be high. But if you can keep your desires at bay when prices look low, particularly with less-than-healthy growth stocks, your portfolio will be a lot healthier in the long run.

On that note, there is a pair of cannabis stocks with low valuations that are likely to be tantalizing for investors who want to see their money multiply in value in a short amount of time. Rather than making their shareholders richer, however, both are likely to be poor purchases. Here's why. 

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Source Fool.com