stockbroking
From Longman Business Dictionarystockbrokingstock‧brok‧ing /ˈstɒkˌbrəʊkɪŋˈstɑːkˌbroʊ-/ (also stockbrokerage) noun [uncountable] finance the activity, job, or business of buying shares, bonds etc for other peoplethe rapid growth of online stockbrokinga small stockbroking firm