Why do big Tech stocks get hammered by Wall Street when they increase spending on AI?

Using Alphabet as an example their stock is down 7% after a stellar earnings report. They have to invest heavily in AI to continue strong growth in the future or fall behind. It’s frustrating when Wall Street penalizes companies for something that will inevitably make the company more competitive and generate greater revenue. These companies know what they have to do to maintain future growth and still get penalized for it. Help me make sense of it please.

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