Shares of (NASDAQ: ROKU) have trounced the Nasdaq Composite Index in 2023, up 106% as of Sept. 7. The market seems to be intrigued once again by growth tech businesses. But despite this renewed optimism, shares are still 82% off their all-time high, and they trade at a historically cheap price-to-sales ratio of 3.7. 

Even though it has done so well this year, now might still be a good time to consider adding this streaming stock to your portfolio. But there's also a key risk to keep in mind. 

Here are three compelling reasons that investors should buy Roku, as well as one important reason to sell. 

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Source Fool.com