Risk Concentration in Stocks Is `Very Frightening': Tobam

Risk Concentration in Stocks Is `Very Frightening': TobamSep.14 -- The risk concentration in equities, particularly in U.S. and emerging markets, is "very frightening," says Tatjana Puhan, deputy chief investment officer at Tobam SAS. "On the one side it's high sector concentration, but on the other it's also high idiosyncratic concentration because you have very few very big stocks," she said in an interview on "Bloomberg Markets: European Open."