AI stocks are on the move after hours. The primary catalyst is earnings from Alphabet (Nasdaq: GOOGL). While Alphabet shares are off nearly 7%, there was news in their earnings release that is very good for a group of other companies.

Alphabet reports fourth-quarter earnings after Tuesday's closing bell. Investors will be focused on cloud momentum and AI traction, with shares of the Google and YouTube parent company holding fast near the record levels achieved last week.