Six investors reveal the biggest market risks — and one strategy they agree on

Traders work on the floor of the New York Stock Exchange (NYSE) in New York on July 23, 2026. Angela Weiss | AFP | Getty ImagesIt has been a volatile year for global markets, rewarding some trades while punishing others.CNBC asked six investors about the biggest risks they see and how they are positioning portfolios in response. Despite differing views on the biggest threat to markets, the investors repeatedly returned to the same response: diversify beyond this year's biggest winners. Fading U.S. exceptionalism Chris Rush, investment manager at IBOSS, told CNBC the biggest risk investors were taking was being "too concentrated in the winners of the past and missing other opportunities around the world." "It is easy to focus on the short-term noise," he said. "But with U.S. equities already making up such a large proportion of global portfolios, we think concentration is a bigger risk. U.S. exceptionalism has also started to fade from the levels seen before 2025, while rising debt levels among the Magnificent Seven add to the risks of continuing to chase the same companies."Real estate investment trusts, which Rush said "have been out of favor for years but now look increasingly at...