Following the collapse of Lehman Brothers in 2008, the Federal Reserve and the Bank of England implemented asset purchase programs to provide further liquidity to faltering markets, and to continue to place downward pressure on market interest rates. Later called Quantitative Easing, the higher asset prices and lower market yields induced by the purchases were expected to translate into lower market borrowing costs and increased investment. This project focused on estimating the effect of Quantitative Easing on real investment in the US and UK up to 2010. First, the historical relationship between bond yields and investment was estimated using a time series econometric model called a structural vector autoregression. Next, using the historical relationship between bond yields and investment, the impact of the asset purchases on investment was calculated using the bond yield changes induced by Quantitative Easing announcements. Deviations in bond yields on Quantitative Easing announcement dates suggested an impact on investment of 5.93% in the US, and an impact of 3.37% in the UK. Moreover, both the US and UK econometric results are statistically significant. Taking into account the econometric assumptions required to estimate the impact of Quantitative Easing on investment, the results in this project should be viewed with caution. However, the results will be useful in framing future thought on Quantitative Easing as a tool to provide macroeconomic stability