The CNBC Investing Club with Jim Cramer has hosted a "Morning Meeting" livestream at 10:20 a.m. ET on Wednesday, with the S & P 500 and Nasdaq reaching record highs due to progress towards a potential U.S.-Iran peace deal. Shares of Arm Holdings rose by 12% ahead of earnings, but Cramer warned that investors should not expect a significant post-report rally even if the chip maker delivers strong results. He also mentioned a new optical fiber partnership between Corning and Nvidia, which led to an 11% rise in Corning shares. Cramer also commented on the increasing importance of compute and AI in the economy. He expressed regret not re-buying Advanced Micro Devices like he did with Alphabet. Other notable topics included Amazon, Alphabet, Amazon, Arm, Corning, and Nvidia.