China's Baidu Inc BIDU.O gained 2.9% after reporting a 25% rise in quarterly revenue, powered by advertising on its core search and video-streaming platforms. By Medha Singh May 18 (Reuters) - Wall Street's main indexes were set to open higher on Tuesday after better-than-expected results from Walmart and Home Depot signaled strength in consumer demand against the backdrop of rising prices. "The market still remains fearful of runaway inflation and the narrative is driven by the game of catch-up from the supply chain side while fundamental earnings and GDP performance are not back at pre-pandemic levels."