NVIDIA's stock jumped 5% on Tuesday, closing at a record high and pushing the company's valuation to $4.89 trillion, just shy of the $5 trillion milestone. The surge followed a wave of new announcements at its GTC event in Washington, D.C., covering AI, supercomputing, and major industry partnerships. NVIDIA's shares have risen more than 50% year-to-date, more than doubling since April, fueled by demand for GPUs powering cloud data centers from Amazon, Google, and Microsoft. The company has a...