MTF or Margin Trading Facility in Stock Trading: MTF or Margin Trading Facility in Stock Trading Use mStock's Margin Funding and Zero Brokerage throughout all merchandise incl ... atOptions = { 'key' : 'a8dfc29b76f8e0e43144f40c1f6e4e79', 'format' : 'iframe', 'height' : 90, 'width' : 728, 'params' : {} }; document.write('');