BREAKING: lawyers at Simpson Thatcher working on lawsuit over $600 million margin call from last Friday that got doubled today to $1.2 billion. There will be blood $GS $JPM $DB $C $BAC $MS $DB $CS $BCS $HSBC $UBS $WFC $PNC $TD $BKRIY $COF $CFG. https://t.co/hVqdBSWJ1U