Trading Block: A bit of a selloff today - Yellen signals growing likelihood of a December rate hike. OCC cleared contract volume increased 10% in November. SEC charges twin brothers with fraud for options trading Spoofing and order mismarking.

Odd Block: Call buyers in Medtronic PLC (MDT), call sellers in Emerson Electric Co. (EMR), and put sellers in InvenSense Inc. (INVN)

Around the Block: Non Farms tomorrow (12/4)