Explain the different effects that quantitative easing and operation twist were expected to have on the yield curve. Quantitative easing pushes the upper end of the yield curve down directly, thereby holding down the interest rate for investors and stimulating asset markets and the economy. Operation twist places downward pressure on the long-term rate and upward pressure on the short-term rate. Quantitative easing pushes the upper end of the yield curve up directly, thereby not changing the interest rate for investors and not stimulating asset markets and the economy. Operation twist places no pressure on the long-term rate and upward pressure on the short-term rate. Quantitative easing pushes the lower end of the yield curve down directly, thereby holding up the interest rate for investors and stimulating asset markets and the economy. Operation twist places upward pressure on the long-term rate and downward pressure on the short-term rate. Quantitative easing shifts up the upper end of the yield curve directly, thereby holding up the interest rate for investors and depressing asset markets and the economy. Operation twist places upward pressure on long-term and short-term rates.