STAAR Surgical (NASDAQ: STAA) has been a top-performing healthcare stock over the past year, with a mouth-watering return of 244%, compared to a 48% rise in the S&P 500 over the same period. 

Right now, STAAR Surgical is prohibitively expensive at 33 times revenue and 991 times earnings. Existing shareholders are probably thinking about cashing out at all-time highs. Is this a safe stock for new investors?  

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Source Fool.com