After-tax Real Return In January of 2014, Robin invested $25,000 into a 5-year GIC from Tangerine Bank at an annually compounded rate of 1.80% inside a non-registered, fully taxable account. She lived in the province of Alberta and earned $96,000/year through employment and, therefore, had a marginal tax rate of 36.0%. The table below shows the consumer price index (CPI) over the same period. What was Robin's after-tax real rate of return on her 5-year GIC? Alberta CPI | 2014 2015 2016 2017 2018 2019 132. 2133. 7135. 2137. 3140. 6143.1 All-items