Today the SPX fell over 18 points (-0.86%) on lighter volume than Friday. VIX closed up significantly, but still only at 14.5 or so. VXST is again higher than the VIX - a forewarning of more volatility to come. In the other hand, the SKEW actually fell to 121 however.
I sold the Sep28'16 SPX 2110/2100 put spread near the close for 80 cents. This two day trade is placed below the major support level at 2120, and about 3% off Fridays close. The market has to really react negatively to the debate in order to fall that far, as only unimportant economic data is on the cards for release tomorrow. Yellen will speak on Wednesday and that could roil markets a bit.