Universality in multifield inflation from string theory

We develop a numerical statistical method to study linear cosmological uctuations in ina-tionary scenarios with multiple fields, and apply it to an ensemble of six-field inection-point models in string theory. The latter are concrete microphysical realizations of quasi-single field ination, in which scalar masses are of order the Hubble parameter and an adiabatic limit is reached before the end of ination. We find that slow-roll violations, bending trajectories and \many-field" effects are commonplace in realizations yielding more than 60 e-folds of ina-tion, although models in which these effects are substantial are in tension with observational constraints on the tilt of the scalar power spectrum.