Boeing ( BA ), Intel ( INTC ) and Caterpillar ( CAT ) closed with gains of around 2%. [ibd-display-video id=3076727 width=50 float=left autostart=true] Bitcoin was volatile again, giving up the 14,000 level, after published reports said South Korea is taking steps to ban trading of the cryptocurrency . Finally, traders looking for signs of more inflation were left disappointed on news that wholesales prices slipped 0.1% in December, below the consensus estimate of a 0.2% increase.