Baird analyst Andrew Wittmann downgraded CB&I to Neutral from Outperform after litigation was filed this morning between the company and Westinghouse, its former partner for U.S. nuclear projects. The court filing shows a $2.4B difference on working capital adjustments associated with last year's transaction, Wittmann tells investors in a research note. The lawsuit looks "frivolous," but is an overhang nonetheless, the analyst contends. He cut his price target for the shares to $40 from $45. UBS this morning also downgraded CB&I on the Westinghouse overhang. The stock is down 7%, or $2.64, to $36.11 in morning trading.