For years, seniors have been told to unload their stocks once they reach retirement and move over to safer investments — namely, bonds. And to an extent, that advice still makes sense. Because stocks are far more volatile than bonds, holding them becomes riskier for seniors. Unlike younger workers, who have time to ride out the market’s ups and downs and can therefore afford to invest their nest eggs heavily in stocks, retirees need those savings to cover their day-to-day expenses.