S&P 500 (SPY) futures slip 0.3% and Nasdaq 100 (QQQ) -0.3% as global markets continue to sell off. Europe's down less than 1%, but the real damage was in Asia, with the Nikkei off 6.4%, Shangahi down 2.8%, and the Hang Seng -2.2%. U.S. Treasury yields helpfully back up a bit, the 10-year off 5 bps to 2.18%. TLT +0.9% premarket.