That’s one lesson from the $3 billion slide in market value for his bank UBS (UBSG.S) on Wednesday. The report says that the DOJ is launching a full-scale investigation into Credit Suisse, which UBS now owns after a state-backed rescue in March. UBS has about $6 billion of provisions set aside for legal and regulatory bills, suggesting shareholders are well protected against Credit Suisse’s historic nasties. After Wednesday’s slide, UBS’s share price is almost exactly in line with its most recent tangible book value per share, compared with a roughly 30% premium back in early March. The implication is that investors are less excited about UBS’s prospects after incorporating Credit Suisse than they were about its standalone story.

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Persons: Sergio Ermotti can’t, Liam Proud, ’, quagmire, Neil Unmack, Oliver Taslic Organizations: Reuters, UBS, Bloomberg, U.S . Department of Justice, DOJ, Credit Suisse, Credit, X, Thomson Locations: Ukraine