A new study from the Modern Markets Initiative shows how much a financial transaction tax — like ones proposed by Bernie Sanders and Kamala Harris — would cost those saving for college and retirement. The study outlines how much 529 college savings plans, university endowments, public pension funds, 401(k) plans, and IRAs would owe annually under a financial transaction tax. "While free college is admirable, should our teachers' pension funds be paying for it?" Kirsten Wegner, the CEO of MMI, told Markets Insider in an interview. Read more on Markets Insider.