 As already pointed out by Karatzas \& Shreve \mbox{%DIFAUXCMD KS0pt%DIFAUXCMD (see also Jarrow \& Protter \mbox{%DIFAUXCMD JP }0pt%DIFAUXCMD )}  }  this allows for arbitrages in the market.
<clarity>  As already pointed out by Karatzas \& Shreve \mbox{%DIFAUXCMD KS0pt%DIFAUXCMD (see also Jarrow \& Protter \mbox{%DIFAUXCMD JP }0pt%DIFAUXCMD )}  }  this allows for arbitrages in the market.
 As already pointed out by Karatzas 0pt%DIFAUXCMD (see also Jarrow \& Protter \mbox{%DIFAUXCMD JP }0pt%DIFAUXCMD )} } this allows for arbitrages in the market.