The S&P 500 and Nasdaq reached new all-time highs in early October 2026, driven by artificial intelligence enthusiasm. The Nasdaq Composite closed near 27,477 on October 5, while the S&P 500 touched between 7,830 and 7,840 the following day, surpassing its previous peak of 7,816.7 and marking its 28th record high of the year. Nvidia surged 1 to 2.2 percent, pushing its market value toward $6 trillion, alongside gains from Meta, Microsoft, Tesla, and Broadcom. The 10-year Treasury yield holds between 5.29 and 5.35 percent, its highest level since 2002-2007, while corporate earnings growth projections reach 29.5 percent year over year, fueled by AI investments.
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