Samsung warning; SoftBank and WeWork; Carlos Ghosn speaks in public

London (CNN Business)1. More tech trouble: Samsung has warned that its fourth-quarter operating profit is set to plunge nearly 30% compared to last year. Samsung, the world’s largest smartphone maker, didn’t mention China in its earnings guidance, but it said that “mounting” macroeconomic uncertainties were affecting its business. 2. SoftBank rethinks WeWork: SoftBank is planning to inject $2 billion into coworking space company WeWork, a person familiar with the deal told CNN Business. The source said the deal is expected to close this week. The investment, first reported by the Financial Times, is a fraction of what was once reportedly on the table. SoftBank (SFTBF) had considered investing as much as $16 billion into WeWork this year, the FT reported. …