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On Monday, October 5, 2026, the Nasdaq closed at a record 27,477.31, up 1.1%, while the S&P 500 gained 0.7% to 7,773.95. AI-linked and other large technology stocks helped lift shares, led by Nvidia. Treasury yields rose too: the Associated Press reported the 10-year yield at 5.31%, up from 5.28% late Friday. The headline appears to refer to this session, though its original source is unconfirmed.
How the major indexes finished on October 5
The Nasdaq Composite rose 1.1% to 27,477.31, a record closing level, according to the Associated Press. The S&P 500 advanced 0.7% to 7,773.95, but remained below its previous record at that point. These are closing figures, not live quotes.
Reuters’ report, republished by Kitco, described an earlier snapshot at 10:19 a.m. ET: the S&P 500 was up 0.39% to 7,753.05 and the Nasdaq was up 0.62% to 27,360.28. The difference from the closing figures reflects the time of measurement; the intraday numbers should not be mistaken for the final levels.
Which stocks helped lift the market?
AI-linked shares and large technology companies were among the supports for the advance. The Associated Press identified Nvidia, up 2.1%, as the strongest individual force lifting the S&P 500 that day. Reuters also reported early gains in Nvidia, Meta Platforms, Microsoft and Tesla.
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That evidence points to contributions from prominent technology and AI-related companies, not a rally in every AI stock or proof that AI was the sole reason indexes rose. Investors were also weighing expectations for corporate earnings and growth.
Why stocks rose as Treasury yields surged
There is no necessary contradiction between rising stocks and rising bond yields. Investors can expect stronger earnings or growth—particularly from large technology companies—while also demanding higher returns on bonds. On October 5, market reports described optimism about earnings and technology alongside concerns about government finances, debt issuance, energy costs and inflation.
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Higher Treasury yields can weigh on stocks because they raise borrowing costs for households and businesses and can make bonds more attractive relative to higher-priced shares. The Associated Press also noted that spending on AI data centers was one factor supporting economic strength and bond yields. In other words, the same investment boom can encourage optimism about some companies while contributing to the economic and financing pressures that push yields higher.
What the Treasury yield figures show
Reports put the 10-year Treasury yield near 5.30% on October 5, but the exact reading varied with the source and observation time. The Associated Press reported 5.31%, compared with 5.28% late Friday. Reuters reported 5.296% in its intraday report. Kiplinger reported 5.309% for the 10-year and 5.664% for the 30-year, both at new 52-week highs. These are dated report readings, not current yields.
The 10-year and 30-year figures refer to different maturities, so they are not interchangeable. Small differences among reports for the 10-year reflect timing and reporting precision rather than a single uniform live quote.
A record index does not mean every stock rose
Reuters’ intraday breadth counts show why an index record should not be read as a market-wide advance. At its snapshot, the S&P 500 had 3 stocks at new 52-week highs and 18 at new lows; the Nasdaq had 23 new highs and 157 new lows. Those counts are a snapshot of individual stocks, not closing figures or a measure of how every constituent performed.
An index can rise to a record while many of its component stocks lag, particularly when a smaller group of large companies contributes substantially to its movement. The Nasdaq’s closing record therefore describes the index level, not the experience of every listed company.
Keep the date attached to the headline
“Today” in the headline most plausibly refers to Monday, October 5, 2026, based on matching reports from Reuters and the Associated Press; the headline’s exact original source was not confirmed. Tuesday, October 6, was a separate session: The Guardian reported that both the S&P 500 and Nasdaq closed at records after an AI-chip rally as Treasury yields dipped. Those next-day moves should not be folded into the October 5 results.
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