Global technology shares recovered some poise on Tuesday, but remained vulnerable after a rout sparked by the emergence of a low-cost Chinese artificial intelligence model made investors question the sky-high valuation and dominance of AI bellwethers. Shares of chipmaker Nvidia (NVDA-Q), the poster child of the AI boom in recent years, fell 17% on Monday, wiping $593 billion from its market value - a record one-day loss for any company - and dragging U.S. stocks lower. By Tuesday, Nvidia shares were up nearly 6% in Frankfurt, while those in Oracle rose 3.4% and AI data analytics company Palantir rose 2.97%....