Jerome Powell, chairman of the US Federal Reserve, during a Senate Banking, Housing, and Urban Affairs Committee hearing in Washington, DC, US, on Tuesday, July 9, 2024.Veteran investor David Roche expects a bear market in 2025 caused by smaller-than-expected rate cuts, a slowing U.S. economy and an artificial intelligence bubble."I think [a bear market] is probably coming, but probably in 2025. We now know what will cause it," the strategist at Quantum Strategy told CNBC's "Squawk Box Asia" on Monday. Roch ...