Concordance of Bing Doubles and Boundary Genus

Cha and Kim proved that if a knot K is not algebraically slice, then no iterated Bing double of K is concordant to the unlink. We prove that if K has nontrivial signature ! , then the n‐iterated Bing double of K is not concordant to any boundary link with boundary surfaces of genus less than 2 n" 1 ! . The same result holds with ! replaced by 2" ,t wice the Ozsv´´ ok not concordance invariant.