Market Internals update at 15:30ET

NYSE volume 519M shares, 3% below its one-month average; Advancers lead decliners by 1.1:1 - - NASDAQ volume 7.89B shares, 16% below its one-month average; Advancers lead decliners by 1.4:1 - - VIX index -4.5% at 17.59