eBay jumped more than 5% after Morgan Stanley named it a top pick and raised its price target to $132. The firm estimates the $27 billion live-selling market drives over 40% of eBay's growth. (CNBC) (CNBC)

Meta Platforms gained more than 3% on speculation that it is preparing to launch a new AI model codenamed Watermelon. The buzz grew after Meta AI chief Alexandr Wang posted a watermelon emoji on X. (CNBC) (CNBC)

The mood was weaker for AI-infrastructure plays. Lumentum slid 9% and Ciena fell more than 8% as investors took profits after last Friday's rebound. Memory stocks also dipped: Micron and Seagate lost about 3%, and Sandisk lost more than 5%. (CNBC) (CNBC)

IonQ fell more than 8% after buying cybersecurity firm Elisity for $1.3 billion, and Rigetti and D-Wave dropped roughly 5% in sympathy. (CNBC)

Percentages change during the trading day. This is not investment advice.