  We have analysed the optical polarimetric properties of nearby
intermediate-late type MS stars and examined in some detail the pecularities
displayed by those known to have planets. We find that: i) the polarization
degree is not strictly correlated with the presence of planets; ii) there is a
lack of high eccentricity planets at high optical linear polarization levels;
iii) no clear correlation is seen between metallicity and polarization amongst
extra-solar systems; iv) the contribution to the polarization by the
interstellar medium seems to become effective only after ~70 pc.
