Pick the biggest loser:1/ $GE @ $7.32: $GE, GE Aerospace / H1 2/ Tandem $TNDM @ $35.22. $TNDM, Tandem Diabetes Care, Inc. / H1 3/ Deutsche Bank $DB $DB, Deutsche Bank AG / H1 ...and last but not least, volatile $AMD @$21.36. $AMD, Advanced Micro Devices, Inc. / H1