This paper examines the spillover effects of U.S. unconventional monetary policy (UMP) on emerging market capital flows and asset prices. Affine term structure model estimates show that U.S. monetary policy shocks, identified with high-frequency Treasury futures data, represent revisions to expected short-term yields and term premia, especially during the UMP period. The policy shocks exhibit sizable effects on U.S. holdings of emerging market assets. These effects disproportionately manifest through valuation changes versus physical flows, are more pronounced for equity relative to bond markets, and are asymmetric between the quantitative easing and tapering periods, with flows more important during the unwinding.