Retirement investors of all ages increasing bets on the stock market By: CNBC.com News June 06, 2017 at 08:25 AM EDT Even investors as old as 69 have more than half their 401(k) in stocks, as retirement bets on the market keep increasing. Read More >> Related Stocks: S&P Smallcap Ishares Core ETF S&P Total US Stock Market Ishares Core ETF