I am tempted by the long runs of the 30 year Treasury bond, symbol ZB. The swings are close to twice the size of the swings of the 10 year Note, symbol ZN. However, the 30 year bond trades in whole points compared to half points on the 10 year Note and the volume is considerably less. This likely means more slippage. Also, I like to use range bar charts but charts under 2 points are not meaningful for ZB whereas one point range bar charts are clear for ZN. I realize that the answer may be that if I am not willing to take, what seems to be the larger risk of ZB, then I should stay with ZN. I would appreciate any helpful comments.