Rambus (RMBS) shares are down and implied volatility is easing after an appeals court ruled to re-hear patent cases in October. Shares are falling to session lows, down $2.40 to $19.50. Options action is brisk. 28K calls and 39K puts traded. Yet, while shares are reeling, implied volatility is also falling on diminishing uncertainty, down about 31 percent to 62.5. (Posted in Premium at 13:21).