3 Stocks That Have Doubled and Still Have Room to Grow

A component of Sir Isaac Newton's first law of motion is that an object in motion tends to stay in motion at the same speed and direction until acted upon by an unequal force. That doesn't apply to stocks, which can and do fluctuate on a daily basis.

Yet sometimes stocks of companies with good business prospects do keep to a general course, and though there may be ups and downs, their trajectory seems to remain upward. That's what three Motley Fool contributors believe is the case with The Trade Desk (NASDAQ: TTD), Cintas (NASDAQ: CTAS), and Zscaler (NASDAQ: ZS). Read on to learn why they believe these businesses that have already doubled still have more room to keep growing.

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