	professor lifts banc texas btx preferred stake a university of massachusetts finance professor said he raised his stake in banc texas group inc to shares of dlr cumulative preferred stock or pct of the total from shares or pct in a filing with the securities and exchange commission ben shirley branch also said he bought shares of class a cumulative convertible preferred stock or pct of the total for dlrs bringing his total investment in both preferred series to about dlrs branch said he bought the stock as an investment but reserved the right to try to influence the company reuter 
