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The FTSE 100 opened lower after Fitch downgraded the US credit rating in a decision branded “arbitrary” by the country’s Treasury Secretary.
European markets including Britain’s blue chip index declined after the world’s largest economy was stripped of its top level AAA credit grade two months after it nearly defaulted on its debts.
The FTSE 100 dropped 0.9pc after the open while the German Dax fell 1.2pc and France’s CAC 40 lost 1pc.
The credit grader cut the US one level from AAA to AA+, echoing a move made more than a decade ago by S&P Global Ratings.