S&P 500 — daily market movers
Macro backdrop
Headline indices were nearly flat — S&P 500 +0.19%, Nasdaq +0.04%, Dow +0.04%. A new quarter opened against a US federal government shutdown (the start of FY2026) and Treasury yields near multi-year highs that eased intraday. The quiet tape masked unusually wide single-stock dispersion: an Accenture-led tech/AI and refiner rally offset a broad healthcare and life-sciences selloff.
Top 10 gainers
| # | Ticker | Company / business | Change | Likely Driver |
|---|---|---|---|---|
| 1 | ACN | Accenture Global IT consulting, professional services and systems integration | +15.78% | Fiscal Q4 results showed record new bookings and strong AI-related demand, dispelling fears that generative AI would erode consulting revenue; the beat led the day's double-digit gainers. |
| 2 | SNPS | Synopsys Electronic design automation (EDA) software and design IP for chips | +12.78% | Rallied on reported major AI partnerships (OpenAI and Amazon) for chip-design tools, alongside analyst price-target increases. |
| 3 | FICO | Fair Isaac Credit scoring (the FICO Score) and decision-analytics software | +11.69% | Sharp rebound after a steep year-to-date decline; analysts trimmed targets but stayed bullish, easing VantageScore and mortgage-rule competitive fears — looks like an oversold bounce rather than a fresh positive catalyst. |
| 4 | COHR | Coherent Optical components, lasers and transceivers for AI data centers | +10.90% | Jumped on a Bernstein 'Outperform' initiation and momentum behind its PhotonLink optics push as the AI data-center optical trade extended. |
| 5 | CIEN | Ciena Optical networking systems for telecom and data-center interconnect | +7.77% | Lifted by a bullish Wall Street call on AI-driven demand for optical networking equipment, moving with the broader optics group. |
| 6 | LITE | Lumentum Data-center optical modules, lasers and photonic components | +7.67% | Rose with the AI-optics complex on the same bullish sell-side call favoring data-center optical component makers. |
| 7 | MPC | Marathon Petroleum One of the largest US independent oil refiners and marketers | +6.25% | Refiners rallied on strong refining margins, outrunning the integrated majors; Marathon led the downstream-margin trade. |
| 8 | CDNS | Cadence Design Systems EDA software and design IP for chip and system design | +6.22% | Climbed on AI chip-design product news (a verification-speed breakthrough) and continued semiconductor-design momentum, echoing peer Synopsys. |
| 9 | CTSH | Cognizant IT services, consulting and digital outsourcing | +5.99% | Rose about 7% in direct read-through to Accenture's strong results, which reset sentiment on AI as a tailwind for IT-services demand. |
| 10 | CDW | CDW Reseller of IT hardware, software and solutions to business and government | +5.98% | Lifted by the IT-spending relief rally sparked by Accenture's bookings, supporting hardware and solutions resellers. |
- 1. ACN+15.78%AccentureGlobal IT consulting, professional services and systems integrationFiscal Q4 results showed record new bookings and strong AI-related demand, dispelling fears that generative AI would erode consulting revenue; the beat led the day's double-digit gainers.
- 2. SNPS+12.78%SynopsysElectronic design automation (EDA) software and design IP for chipsRallied on reported major AI partnerships (OpenAI and Amazon) for chip-design tools, alongside analyst price-target increases.
- 3. FICO+11.69%Fair IsaacCredit scoring (the FICO Score) and decision-analytics softwareSharp rebound after a steep year-to-date decline; analysts trimmed targets but stayed bullish, easing VantageScore and mortgage-rule competitive fears — looks like an oversold bounce rather than a fresh positive catalyst.
- 4. COHR+10.90%CoherentOptical components, lasers and transceivers for AI data centersJumped on a Bernstein 'Outperform' initiation and momentum behind its PhotonLink optics push as the AI data-center optical trade extended.
- 5. CIEN+7.77%CienaOptical networking systems for telecom and data-center interconnectLifted by a bullish Wall Street call on AI-driven demand for optical networking equipment, moving with the broader optics group.
- 6. LITE+7.67%LumentumData-center optical modules, lasers and photonic componentsRose with the AI-optics complex on the same bullish sell-side call favoring data-center optical component makers.
- 7. MPC+6.25%Marathon PetroleumOne of the largest US independent oil refiners and marketersRefiners rallied on strong refining margins, outrunning the integrated majors; Marathon led the downstream-margin trade.
- 8. CDNS+6.22%Cadence Design SystemsEDA software and design IP for chip and system designClimbed on AI chip-design product news (a verification-speed breakthrough) and continued semiconductor-design momentum, echoing peer Synopsys.
- 9. CTSH+5.99%CognizantIT services, consulting and digital outsourcingRose about 7% in direct read-through to Accenture's strong results, which reset sentiment on AI as a tailwind for IT-services demand.
- 10. CDW+5.98%CDWReseller of IT hardware, software and solutions to business and governmentLifted by the IT-spending relief rally sparked by Accenture's bookings, supporting hardware and solutions resellers.
Common Themes
Eight of the ten gainers sit in the tech/AI complex: IT consulting and services (ACN, CTSH, CDW), chip-design EDA software (SNPS, CDNS), and AI data-center optics (COHR, CIEN, LITE). Accenture's record bookings reframed AI as a tailwind rather than a threat to IT services, while a bullish optics call and Cadence's AI product news powered the semiconductor-adjacent names. Marathon Petroleum stood apart on refining margins, and FICO was an idiosyncratic oversold bounce.
Top 10 losers
| # | Ticker | Company / business | Change | Likely Driver |
|---|---|---|---|---|
| 1 | PSKY | Paramount Skydance Media company: film studios, streaming (Paramount+) and broadcast | -9.58% | Fell on a roughly $44B debt issuance to finance the Warner Bros. Discovery acquisition; leverage and deal-execution risk weighed (shares are also set to split Oct 5). |
| 2 | MKC | McCormick Maker of spices, seasonings and flavorings | -4.87% | Slid after its fiscal Q3 report: a headline EPS beat was overshadowed by soft volume trends and a cautious guidance and dividend-safety focus. |
| 3 | DHR | Danaher Life-sciences tools, diagnostics and bioprocessing | -4.42% | Dropped as part of a broad life-sciences and healthcare selloff, with lingering post-earnings demand concerns for bioprocessing and diagnostics tools. |
| 4 | INCY | Incyte Biopharma focused on oncology and dermatology drugs | -3.47% | Declined with the biotech/healthcare group in a sector-wide rotation; no clear standalone catalyst on the day. |
| 5 | DIS | Walt Disney Media networks, streaming, theme parks and film studios | -3.40% | Fell amid media-sector weakness and a company-specific overhang; no single confirmed catalyst identified, though it moved sharply lower with the media names. |
| 6 | AMGN | Amgen Large-cap biotech (biologics; inflammation and oncology) | -3.38% | Sold off with the broader healthcare and biotech complex as money rotated out of the sector. |
| 7 | TMO | Thermo Fisher Scientific Life-sciences instruments, reagents and lab services | -3.34% | Declined within the life-sciences-tools selloff alongside its instrument-and-reagent peers. |
| 8 | A | Agilent Technologies Analytical lab instruments and life-sciences tools | -3.27% | Fell with life-sciences-tools peers in the sector rotation; no standalone catalyst. |
| 9 | KMB | Kimberly-Clark Consumer-staples tissue and personal-care products (Huggies, Kleenex) | -3.17% | Defensive consumer-staples name sold as investors rotated into risk and tech; no company-specific news. |
| 10 | WAT | Waters Analytical instruments (chromatography, mass spectrometry) for labs | -3.15% | Dropped with the life-sciences-tools group amid the healthcare rotation. |
- 1. PSKY-9.58%Paramount SkydanceMedia company: film studios, streaming (Paramount+) and broadcastFell on a roughly $44B debt issuance to finance the Warner Bros. Discovery acquisition; leverage and deal-execution risk weighed (shares are also set to split Oct 5).
- 2. MKC-4.87%McCormickMaker of spices, seasonings and flavoringsSlid after its fiscal Q3 report: a headline EPS beat was overshadowed by soft volume trends and a cautious guidance and dividend-safety focus.
- 3. DHR-4.42%DanaherLife-sciences tools, diagnostics and bioprocessingDropped as part of a broad life-sciences and healthcare selloff, with lingering post-earnings demand concerns for bioprocessing and diagnostics tools.
- 4. INCY-3.47%IncyteBiopharma focused on oncology and dermatology drugsDeclined with the biotech/healthcare group in a sector-wide rotation; no clear standalone catalyst on the day.
- 5. DIS-3.40%Walt DisneyMedia networks, streaming, theme parks and film studiosFell amid media-sector weakness and a company-specific overhang; no single confirmed catalyst identified, though it moved sharply lower with the media names.
- 6. AMGN-3.38%AmgenLarge-cap biotech (biologics; inflammation and oncology)Sold off with the broader healthcare and biotech complex as money rotated out of the sector.
- 7. TMO-3.34%Thermo Fisher ScientificLife-sciences instruments, reagents and lab servicesDeclined within the life-sciences-tools selloff alongside its instrument-and-reagent peers.
- 8. A-3.27%Agilent TechnologiesAnalytical lab instruments and life-sciences toolsFell with life-sciences-tools peers in the sector rotation; no standalone catalyst.
- 9. KMB-3.17%Kimberly-ClarkConsumer-staples tissue and personal-care products (Huggies, Kleenex)Defensive consumer-staples name sold as investors rotated into risk and tech; no company-specific news.
- 10. WAT-3.15%WatersAnalytical instruments (chromatography, mass spectrometry) for labsDropped with the life-sciences-tools group amid the healthcare rotation.
Common Themes
The losers were overwhelmingly healthcare: life-sciences tools (DHR, TMO, A, WAT) and biotech/pharma (INCY, AMGN) made up most of the group, with no single fresh catalyst — consistent with the sector being used as a funding source for the day's risk-on rotation. Defensive staples (KMB) were also sold. The two media names (PSKY, DIS) were separate, weighed by debt and deal concerns around the Paramount-Warner Bros. Discovery situation.
Overall read
Beneath a flat index tape, money rotated decisively out of defensive healthcare and life-sciences names and into the AI/tech complex — IT services, EDA and data-center optics — plus energy refiners. Accenture's results were the day's sentiment pivot for IT spending, and the move read as risk-on under the surface despite the government-shutdown backdrop.