Hello, I am new to rates. Does it sometimes happen that one expiry is cheaper than further ones on Eurodollar? Fed Funds ? It would mean that the longer term rate is less than the shorter one and also that the difference is so important that the shorter bond is making more in less time( If that makes sense...LOL ). Does the fact that we are trading futures instead of the bond itself makes a difference?( I don't know the exact relationship between bonds and bond futures ). Thanks.