conn = yahoo('http://download.finance.yahoo.com');
IBM = fetch(conn,{'IBM'},{'Adj Close'}, '2012-01-01','2015-08-01','d');
MO = fetch(conn,{'MO'},{'Adj Close'}, '2012-01-01','2015-08-01','d');

%IBM = [datestr(IBM(:,1),2) IBM(:,2)]
%MO = [datestr(MO(:,1),2) MO(:,2)]

IBM = cellstr([datestr(IBM(:,1),2)])
MO = cellstr([datestr(MO(:,1),2)])

IBM = {cellstr([datestr(IBM(:,1),2)]) IBM(:,2)}
MO = {cellstr([datestr(MO(:,1),2)]) MO(:,2)}