Alphabet is embracing generative AI, even if it means Google Search may no longer be as dominant as it once was.

Alphabet ( GOOG 1.04% ) ( GOOGL 1.06% ) has been one of the most fascinating megacap growth stocks this year. In June, it was badly underperforming the S&P 500 and many of its peers. But the stock has rallied nearly 50% since that point, and is up over 18% in the last month -- closing in on $3 trillion in market cap.

Alphabet's rally showcases the power of changes in investor sentiment. The investment thesis didn't change; rather, the perception of Alphabet's role in the age of artificial intelligence (AI) shifted from negative to positive.

Here's why Alphabet's bold push into AI is somewhat similar to what Walt Disney ( DIS -1.01% ) is doing in th

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