William J. Bernstein promises to lay out an investment strategy that any seven year old could understand and will take just 15 minutes of work per year. He also promises it will beat 90% of finance professionals in the long run, but still make you a millionaire over time. Bernstein is addressing young Americans just embarking on their working careers. Bernstein advocates saving 15% of one's salary starting no later than age 25 into tax-sheltered savings plans (IRA or 401(k) in the U.S., RRSPs or Registered Pension Plans in Canada), and divvying up the money into just three mutual funds: a U.S. total stock market index fund, an international stock market index fund and a U.S. total bond market index fund. For millennials, saving 15% of salary is the financial equivalent of dying, which is why Bernstein titles his document 'IF you can.'