(Reuters) -Shares of Dell and HP fell on Wednesday after the personal computer makers issued forecasts that cast doubt on a market recovery driven by artificial intelligence-enabled PCs. Dell tumbled 11%,

Dell indicated the AI market was a “robust opportunity,” despite the company’s COO warning its AI business would “not be linear.”

Chairman John Idol takes over the CEO spot from Cedric Wilmotte, who is leaving the organization as part of a cost-cutting initiative. HP Inc (HPQ) reports a 2% revenue increase and gains in PC market share, while navigating cost pressures and competitive challenges.