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* WPP declines(Adds China unveiling new tariffs, stocks)
By Julien Ponthus
The pan-regional STOXX 600 index and
The tension could also be felt on the Chinese yuan, whichsuffered its biggest daily fall versus the dollar in two weeksand through lower yields for top-rated
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The European tech sector posted the worstperformance with a fall of 1.6 percent, while cyclical stockssuch as financials and industrials also weighed heavily.
WPP was among the biggest fallers at the open afterthe British advertising group said it was conducting aninvestigation into an allegation of personal misconduct againstits chief executive, Martin Sorrell, who denied any wrongdoing.
The shares gradually recouped some of their losses and weredown 1.5 percent at 0856 GMT.
Swiss Re was down 3.1 percent after the reinsurersaid
Bloomberg reported on March 29 that SoftBank was looking tobuy a 25 percent stake in Swiss Re, worth about
German IT-leasing specialist Grenke was the bestperforming stock, up about 5.9 percent after a positive tradingupdate for the first quarter.(Reporting by Julien Ponthus, Editing by Kit Rees and AlexanderSmith)