The tech-heavy Nasdaq Composite index just recorded its best first half of a year since 1983, driven predominantly by high-growth tech companies like Apple, , and Alphabet.

But investors should be wary about that kind of performance continuing. With all the recent hype around artificial intelligence and the increasing return investors can now get through low-risk Treasuries, it's not unreasonable to think there could be some sort of a reversion in the prices of many high-growth tech stocks. 

Even in a market pullback, though, there is one stock that investors shouldn't stop buying: Amazon (NASDAQ: AMZN).

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Source Fool.com