Lamb prices were again the star for March, ASB senior rural economist Nathan Penny said.
Prices had bucked the normal seasonal pattern with per kg prices lifting above $7.
Records suggested lamb prices were the highest ever recorded for March, he said.
In the opposite camp had been mycoplasma bovis and United States President Donald Trump.
"In an unprecedented move, MPI announced more than 22,000 animals from 22 infected properties were to be slaughtered.