Market Brief: Google Cloud Doubled - Why Did Alphabet Stock Fall 10%?

Alphabet shares fell nearly 10% after its Q3 earnings, even as Google Cloud reported 103% revenue growth. Microsoft and Oracle also reported strong AI related growth, but their stocks moved in the opposite direction, gaining around 4% and 11%. With AI spending climbing across the industry, the contrasting market reactions raise a question: How much growth is enough to justify the cost?