A 401(k) fund most retirement savers still can't get By: CNBC.com News September 16, 2014 at 08:00 AM EDT An industry expert explains his big change of heart over adding ETFs to a retirement plan. It's not just marketing hype; 401(k)s do need ETFs. Read More >> Related Stocks: BlackRock Charles Schwab Smallcap ETF Vanguard