Guggenheim's Scott Minerd. Lucy Nicholson/Reuters Markets are hooked on economic stimulus, and central banks have no exit strategy, Scott Minerd said. "For the time being, we're just addicted to this," Guggenheim's chief investment officer said Monday. Minerd predicted US stocks could plunge 15% by the end of October. Sign up here for our daily newsletter, 10 Things Before the Opening Bell. Central banks are now playing a role they weren't designed for, and have ended up directing markets hooked on its extraordinary stimulus, according to Guggenheim's Scott Minerd."For the time being, we're just addicted to this," Guggenheim's global chief investment officer said at the Milken Institute's 2021 Global Conference Monday.