MarketWatch First Take: Microsoft and Alphabet increase spending on AI, but don’t get carried away yet

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As Alphabet Inc. and Microsoft Corp. vied for investors’ attention Tuesday with dueling earnings reports, one commonality was that both companies are increasing their capital spending on infrastructure, with AI a key component of that spending.

Both Alphabet and Microsoft MSFT beat Wall Street’s expectations, with revenue from cloud computing better than expected, and stabilized search revenue another factor. Especially in the case of Alphabet GOOG GOOGL, the strength in search — at a time when internet advertising revenue…