Annabelle Chih / Bloomberg / Getty Images Nvidia CEO Jensen Huang and Super Micro Computer CEO Charles Liang, during the Computex conference in Taipei, Taiwan, on Wednesday, June 5, 2024. Key Takeaways The S&P 500 declined 1.1% on Tuesday, March 18, as concerns about trade and the economy weighed on sentiment and the tech sector selloff resumed. Shares of server maker Super Micro Computer posted the heaviest losses in the benchmark index amid concerns about near-term headwinds for AI. Discover stock recovered as analysts expressed confidence in the credit card issuer's planned merger with Capital One, despite regulatory concerns. Major…