▁all ▁of ▁the ▁shares ▁of ▁A vo x ▁Limited , ▁based ▁in ▁W re x ham , ▁North ▁Wales . ▁Deutsche ▁B ör se ▁had ▁previously ▁held ▁over ▁ 7 6 % ▁of ▁the ▁shares . ▁On ▁ 2 0 ▁March ▁ 2 0 1 7 , ▁it ▁was ▁announced ▁that ▁Thom son ▁Re ut ers ▁acquired ▁A vo x . ▁ ▁D T CC ▁entered ▁into ▁a ▁joint ▁vent ure ▁with ▁the ▁New ▁York ▁Stock ▁Exchange ▁( N Y SE ) ▁known ▁as ▁New ▁York ▁Port folio ▁Clear ing , ▁that ▁would ▁allow ▁" in vest ors ▁to ▁combine ▁c ash ▁and ▁derivative ▁positions ▁in ▁one ▁clear ing house ▁to ▁lower ▁margin ▁costs ". ▁ ▁Legisl ation ▁ ▁The ▁D T CC ▁supported ▁the ▁Customer ▁Prote ction ▁and ▁End ▁User ▁Rel ief ▁Act ▁( H . R . ▁ 4 4 1 3 ; ▁ 1 1 3 th ▁Congress ), ▁arg uing ▁that ▁it ▁would ▁" help ▁ensure ▁that ▁regul ators ▁and ▁the ▁public ▁continue ▁to ▁have ▁access ▁to ▁a ▁cons olid ated ▁and ▁accurate ▁view ▁of ▁the ▁global ▁market place , ▁including ▁concentr ations ▁of ▁risk ▁and ▁market ▁expos ure ". ▁ ▁Cont ro vers y ▁over ▁n aked ▁short ▁s elling ▁ ▁Several ▁companies ▁have ▁su ed ▁the ▁D T CC , ▁without ▁success , ▁over ▁delivery ▁fail ures ▁in ▁their ▁stock s , ▁alleg ing ▁cul p ability ▁for ▁n aked ▁short ▁s elling . ▁Furthermore , ▁the ▁question ▁of ▁whether ▁D T CC ▁is ▁cul p able