Passive investing in index funds have gained popularity in recent years, but could they be creating catastrophic risk? : If you’re aiming to get your finances on track and you’re in or near retirement, then here’s your chance to claim a FREE copy of an exceptional investing report featuring 5 stocks that The Motley Fool UK is expressly recommending for INVESTORS aged 50 and OVER to consider investing in! Michael Burry, hedge fund manager of The Big Short fame, recently warned of a “passive investing bubble“.