  As a transient X-ray binary, MAXI J1659-152 contains a black hole candidate
as its compact star. MAXI J1659-152 was discovered on 2010 September 25 during
its only known outburst. Previously-published studies of this outburst indicate
that MAXI J1659-152 may have an extreme retrograde spin, which, if confirmed,
would provide an important clue as to the origin of black hole spin. In this
paper, utilizing updated dynamical binary-system parameters (i.e. the black
hole mass, the orbital inclination and the source distance) provided by
\cite{Torres2021}, we analyze 65 spectra of MAXI J1659-152 from
\emph{RXTE}/PCA, in order to assess the spin parameter. With a final selection
of 9 spectra matching our $f_{\mathrm{sc}} \lesssim 25 \%$, soft-state
criteria, we apply a relativistic thin disk spectroscopic model
\texttt{kerrbb2} over 3.0-45.0 keV. We find that inclination angle correlates
inversely with spin, and, considering the possible values for inclination
angle, we constrain spin to be $-1 < a_{*} \lesssim 0.44$ at 90\% confidence
interval via X-ray continuum-fitting. We can only rule out an extreme prograde
(positive) spin. We confirm that an extreme retrograde solution is possible and
is not ruled out by considering accretion torques given the young age of the
system.
