  Bulk properties of strange quark matter (SQM) are investigated within the
SU(3) Nambu-Jona-Lasinio model. In the chiral limit the model behaves very
similarly to the MIT bag model which is often used to describe SQM.
  However, when we introduce realistic current quark masses, the strange quark
becomes strongly disfavored, because of its large dynamical mass.
  We conclude that SQM is not absolutely stable.
