  The lowest multipole moments of the cosmic microwave background (CMB) are
smaller than expected for a scale-invariant power spectrum. One possible
explanation is a cutoff in the primordial power spectrum below a comoving scale
of $k_c \simeq 5.0 \times 10^{-4}$ Mpc$^{-1}$. This would affect not only the
CMB but also the cosmic-shear (CS) distortion of the CMB. Such a cutoff
increases significantly the cross-correlation between the large-angle CMB and
cosmic-shear patterns. The cross-correlation may be detectable at $> 2\sigma$
which, when combined with the low CMB moments, may tilt the balance between a
$2\sigma$ result and a firm detection of a large-scale power-spectrum cutoff.
As an aside, we also note that the cutoff increases the large-angle
cross-correlation between the CMB and low-redshift tracers of the mass
distribution.
