The post Why Chasing a 9% Yield Could Cost You $200,000 in Retirement Income appeared first on 24/7 Wall St.. Replacing a paycheck with a portfolio comes down to one equation: income target divided by yield equals capital required. Pick a $60,000 annual income, roughly what a middle-class household needs to cover essentials after Social Security, and the yield you chase determines both how much capital you need and how long that income lasts. Wi…