US Close 6 October 2026: S&P 500 Closes Above 7,800 for the First Time as CEG.US Jumps 12% on Google Nuclear Deal
The S&P 500 closed at a record 7,818.93 on 6 October 2026, up 44.98 points or 0.58%, its first close above 7,800, as chip leaders and power producers rose and the 10-year Treasury yield eased 4.2 bp to 5.269%. CEG.US gained 12.25% to $300.40 after Google agreed a 20-year deal to buy power from 890 megawatts of new nuclear capacity on the PJM grid, backed by more than $4.3 billion of Constellation investment. The Russell 2000 fell 0.59% as health care sold off: XBI.US closed 3.39% lower.
At a glance
| Index | Close | Change |
|---|---|---|
| S&P 500 | 7,818.93 | +0.58% |
| Nasdaq Composite | 27,599.79 | +0.45% |
| Dow Jones Industrial Average | 51,521.28 | +0.49% |
| Russell 2000 | 2,830.30 | -0.59% |
| VIX | 15.01 | -3.29% |
US 10-year yield 5.269%, down 4.2 bp from Monday's 5.311%. US Dollar Index 101.86, down 0.30%. WTI crude futures US$89.91, up 0.54%, after trading lower early on a G7 plan to release 100 million barrels of reserves. Gold futures US$4,192.70, up 0.86%.
What moved the index
The S&P 500 gained 58 bps on 6 October 2026, and chip and cloud names plus utilities supplied more than half of it.
| Driver | Move | Approx. index weight | Contribution |
|---|---|---|---|
| AVGO.US | +3.67% | about 2.8% | about +10 bps |
| AMZN.US | +1.95% | about 3.8% | about +7 bps |
| AMD.US, MSFT.US | +2.80%, +0.78% | about 7% combined | about +9 bps |
| Utilities (XLU.US) | +2.98% | about 2.4% | about +7 bps |
| Industrials, staples, real estate (XLI.US, XLP.US, XLRE.US) | +0.87%, +0.94%, +1.06% | about 15% combined | about +14 bps |
- AVGO.US +3.67% to $375.81 as AI hardware names rose with MRVL.US, which gained 5.81% to $287.01 after its Investor Day guided fiscal 2031 revenue to $70 billion to $90 billion against a FactSet consensus of $47.04 billion.
- AMD.US +2.80% to $649.42 after a Citi note on CPU demand from Meta's Muse AI agent.
- XLU.US +2.98%, the best sector, as CEG.US, VST.US +10.77% and NRG.US +7.02% rose together.
- $239.24 on NVDA.US (+0.14%), a market value near $6 trillion per Bloomberg, added about 1 bp.
Together these drivers account for about 47 bps of the 58 bps move; the residual is spread across financials (XLF.US +0.24%), energy (XLE.US +0.47%) and materials (XLB.US +0.46%), less about 2 bps from health care (XLV.US -0.17%).
Session highlights
Independent power producers posted 3 of the 10 largest gains above $2 billion in market value on 6 October 2026 after the Constellation and Google agreement.
- CEG.US +12.25% to $300.40; Google will also take power under a separate 2,700-megawatt supply agreement, per CNBC.
- 10.77% was the gain on VST.US to $160.50 after the Energy Department unveiled a $4.2 billion nuclear investment in Pennsylvania and Ohio.
- TLN.US +12.43% to $373.11 and GEV.US +3.96% to $1,029.21; URA.US, the uranium ETF, rose 4.01%.
- CIEN.US +13.85% to $443.65, NBIS.US +7.44% and ALAB.US +7.58% as optical and AI networking names climbed; CRWV.US added 4.95%.
- STX.US -9.18% to $805.63 and WDC.US -6.93% to $411.04 on concerns over a possible Toshiba hard-disk capacity expansion, per TheStreet; SNDK.US fell 2.56% and MU.US 1.73%.
- 7.75% was the drop in MRNA.US to $187.46, after a run to a 52-week high and ahead of its return to the Nasdaq-100 before Friday's open; NVAX.US fell 9.87%.
Sector scorecard
Ten of the eleven S&P 500 sectors rose on 6 October 2026, led by utilities at +2.98%.
- Best: XLU.US +2.98%, then XLY.US +1.18% and XLRE.US +1.06%.
- Worst: XLV.US -0.17%, the only sector lower; XLC.US rose 0.04% as META.US fell 0.41%.
- Dispersion (best minus worst): 3.15 pts.
- XBI.US -3.39% and IBB.US -2.34% as genomics and diagnostics names fell; only 48 of 428 Russell 2000 health care members were higher at 1:47pm ET, per TheStreet.
Top movers
| Ticker | Move | Reason |
|---|---|---|
| OPCH.US | +32.65% | McKesson and CD&R deal at $32.05 a share, about $5.8 billion |
| STDN.US | +16.76% | Nuclear names rose after the CEG.US and Google agreement |
| CIEN.US | +13.85% | AI networking names rose; no company release found |
| INIO.US | +12.49% | Unannounced, likely flow-driven. |
| TLN.US | +12.43% | Power producers rose after the CEG.US and Google agreement |
| TWST.US | -18.55% | Unannounced, likely flow-driven. |
| TXG.US | -17.47% | Unannounced, likely flow-driven. |
| ALMR.US | -15.39% | Unannounced, likely flow-driven. |
| TEM.US | -13.85% | Unannounced, likely flow-driven. |
| NEO.US | -13.72% | CEO transition announced Monday with preliminary Q3 revenue |
- CTVA.US +12.27% to $13.91 after JPMorgan upgraded it to overweight.
- LW.US +7.49% to $47.91 after fiscal Q1 adjusted EPS of 75 cents beat the 59-cent FactSet consensus and it lifted fiscal-year guidance to $3.05 to $3.35 a share.
- TWST.US fell a day after rallying on its Eli Lilly antibody data deal; GH.US fell 8.83%, ILMN.US 6.86% and NTRA.US 5.87%.
After-hours earnings
STZ.US and PENG.US reported after the close on 6 October 2026.
- STZ.US beat second-quarter estimates, but beer depletions slipped and its fiscal 2027 EPS outlook missed, per Seeking Alpha; it also agreed to buy ready-to-drink brand SpikedAde. The stock closed the regular session +2.08% at $115.67.
- PENG.US posted fiscal Q4 adjusted EPS of $1.00 against 78 cents expected and revenue of $566.69 million against $516.12 million, and guided fiscal 2027 revenue to $2.25 billion to $2.60 billion. Benzinga printed the shares up 4.33% in after-hours trading at $66.99.
- NEOG.US also reported after the close; it fell 8.07% to $11.96 in the regular session.
Notable announcements
- OPCH.US: CD&R will hold a majority stake and MCK.US will invest about $1.4 billion for about 49%, per Bloomberg; OPCH.US closed at $31.00, 3.3% below the $32.05 offer. MCK.US rose 0.68%.
- LEN.US +3.99% to $77.41 after Berkshire Hathaway disclosed buying about 2.4 million shares.
- PG.US +1.69% after Evercore ISI upgraded it to outperform.
- The August goods and services trade deficit widened to $105.6 billion, the widest since just before last year's tariffs, per CNBC.
Next session catalysts (ET)
- Wed 7 Oct, 2:00pm: minutes of the September FOMC meeting.
- Wed 7 Oct: STZ.US and PENG.US trade on their results in the regular session.
- Thu 8 Oct, before the open: PEP.US Q3 results; weekly jobless claims.
- Fri 9 Oct, before the open: MRNA.US rejoins the Nasdaq-100.
- Fri 9 Oct: DAL.US Q3 results; preliminary October University of Michigan sentiment.
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