  For Majorana fermions the anapole moment is the only allowed electromagnetic
multipole moment. In this work we calculate the anapole moment induced at
one-loop by the Yukawa and gauge interactions of a Majorana fermion, using the
pinch technique to ensure the finiteness and gauge-invariance of the result. As
archetypical example of a Majorana fermion, we calculate the anapole moment for
the lightest neutralino in the Minimal Supersymmetric Standard Model, and
specifically in the bino, wino and higgsino limits. Finally, we briefly discuss
the implications of the anapole moment for the direct detection of dark matter
in the form of Majorana fermions.
