I've gotten the impression there's less risk involved than with a single instrument.

sam028 

A newbie question: as ZB and ZN have a similar value (120 X $1000 now), why using another ratio than 1:1 ?

ZB DV01 > than ZN DV01

cmegroup dot com/trading/interest-rates/invoice-spread-calculator.html]Invoice Spread Calculator

Any thoughts on unemployment claims this following thursday?