S&P 500 Futures Suffer Biggest Down Swing Of 2013 By Contributing Author - Jan 24, 2013: 8:01 pm FacebookTwitterPinterestWhatsApp From the highs this morning as European markets closed, S&P 500 futures have plunged 11.5 points. Doesn’t sound like much – but this is in fact the largest intraday swing of 2013…Keep calm and BTFD. Click image for much larger version… Average: Your rating: None