NEW: Union at Canada's biggest copper mine issues formal strike notice, with a walkout possible as soon as Saturday, Bloomberg reports. A stoppage would tighten a copper market that is already short on supply.

NEW: Lam Research posts quarterly revenue of $8.22 billion, beating the $8.13 billion analysts expected, with adjusted earnings of $2.20 a share. $LRCX Results from a major chipmaking equipment supplier offer a read on semiconductor factory spending.

NEW: Reuters reports eBay plans to cut 9% of its staff to simplify operations and focus on its strongest businesses, its second layoff round this year. $EBAY A second round of cuts in one year points to a push to protect margins at the online marketplace.

NEW: Argus cites a source saying Aramco's Red Sea site at Yanbu and the Shaybah oilfield came through unharmed, following Houthi claims of attacks Monday. Yanbu is a key outlet for Saudi crude exports, so undamaged sites would lessen fears of a supply disruption.

JUST IN: Thermo Fisher executive says the company expects full-year revenue between $47.7 billion and $48.2 billion. $TMO Updated guidance from a major life-sciences supplier gives a read on lab and biopharma demand.

NEW: Carrefour trims its targets for the full year, pointing to turmoil on French streets that has dented shopper sentiment and store traffic. A guidance reduction from a top European retailer hints at softer household spending in France.