Stock market today · Thursday recap
Stock market today: Thursday, October 8, 2026
On Thursday, October 8, 2026, the S&P 500 ETF (SPY) fell 0.42% to $773.93, with the Nasdaq 100 (QQQ) −1.34%, the Russell 2000 (IWM) −0.05%, according to Senntric data. The biggest move among tracked large caps was CoStar Group, Inc. (CSGP), up 8.0% to $29.81.
By Konsta · Senntric data, 4:00 pm ET close · Updated
Index price movement
S&P 500, Nasdaq and Dow on October 8, 2026.
- ▼ −0.42%
S&P 500
SPY ETF
$773.93
Prior close $777.22 · Wed, Oct 7
Last 15 sessions
- ▼ −1.34%
Nasdaq 100
QQQ ETF
$747.58
Prior close $757.73 · Wed, Oct 7
Last 15 sessions
- ▼ −0.05%
Russell 2000
IWM ETF
$277.57
Prior close $277.70 · Wed, Oct 7
Last 15 sessions
Regular-session closes from Senntric’s stored daily bars; change is against the previous session’s close. ETFs track their index, not its exact level.
Fed, BLS, BEA, Treasury
Economic data on October 8, 2026.
High-impact US releases, actual against expected, with the agency that published each one. Times are US Eastern.
No high-impact US release on October 8, 2026.
Senntric’s economic calendar recorded no high-impact release from the Federal Reserve, BLS, BEA or Treasury with an actual for this session.
Stock news October 8, 2026
The biggest stock moves on Thursday.
The largest close-to-close moves among the S&P 500 and the large caps Senntric tracks.
CSGP, October 8, 2026: up 8.0% to $29.81
CoStar Group, Inc. closed at $29.81, from $27.60 on Wed, Oct 7.
▲ +8.0%CRWV, October 8, 2026: down 7.8% to $81.58
CoreWeave, Inc. closed at $81.58, from $88.45 on Wed, Oct 7.
▼ −7.8%ARM, October 8, 2026: down 6.5% to $275.29
Arm Holdings plc American Depositary Receipt closed at $275.29, from $294.37 on Wed, Oct 7.
▼ −6.5%
GLW, October 8, 2026: down 6.4% to $152.83
Corning Inc. closed at $152.83, from $163.25 on Wed, Oct 7.
▼ −6.4%VST, October 8, 2026: down 6.3% to $156.14
Vistra Corp closed at $156.14, from $166.72 on Wed, Oct 7.
▼ −6.3%
CMG, October 8, 2026: up 6.2% to $32.68
Chipotle Mexican Grill, Inc. closed at $32.68, from $30.77 on Wed, Oct 7.
▲ +6.2%
Senntric’s read, October 8, 2026
A broad down day: Russell 2000 −0.1% led and Nasdaq 100 −1.3% lagged; CSGP’s +8.0% was the move that stood out.
Stock market October 8, 2026
Questions about Thursday’s market
How did the stock market do on October 8, 2026?
On Thursday, October 8, 2026, the S&P 500 ETF (SPY) fell 0.42% to $773.93, with the Nasdaq 100 (QQQ) −1.34%, the Russell 2000 (IWM) −0.05%, according to Senntric data. The biggest move among tracked large caps was CoStar Group, Inc. (CSGP), up 8.0% to $29.81.
Why did the stock market go down on October 8, 2026?
A broad down day: Russell 2000 −0.1% led and Nasdaq 100 −1.3% lagged; CSGP’s +8.0% was the move that stood out. No high-impact US economic release was recorded that day. The largest moves among tracked large caps were CSGP +8.0%, CRWV −7.8%, ARM −6.5%.
What did the S&P 500 close at on October 8, 2026?
SPY, the S&P 500 ETF, closed at $773.93 on October 8, 2026, down 0.42% from $777.22 on October 7, 2026, according to Senntric data.
What economic data was released on October 8, 2026?
No high-impact US release from the Federal Reserve, BLS, BEA or Treasury was recorded for October 8, 2026.
Which stocks moved the most on October 8, 2026?
CoStar Group, Inc. (CSGP) +8.0% to $29.81; CoreWeave, Inc. (CRWV) −7.8% to $81.58; Arm Holdings plc American Depositary Receipt (ARM) −6.5% to $275.29; Corning Inc. (GLW) −6.4% to $152.83; Vistra Corp (VST) −6.3% to $156.14; Chipotle Mexican Grill, Inc. (CMG) +6.2% to $32.68. Moves are close to close among the S&P 500 and the large caps Senntric tracks.
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About this data: closes are Senntric’s stored regular-session daily bars; releases are high-impact US events from Senntric’s economic calendar, with the publishing agency linked; alerts come from Senntric’s Situation Awareness Engine. Figures that weren’t stored are left out. Educational content, not investment advice. More: Markets.