S&P 500 · WMTMT

Sep 10Sep 17Sep 25Oct 2Oct 9

Breadth

223 / 503

stocks rose with the index

Concentration

40%

of the gain from MSFT, NVDA, AMD

Biggest driver

MSFT +35

MICROSOFT CORP, +8.66%

Biggest drag

BAC −6

BANK OF AMERICA CORP, −13.19%

What drove it

503 members · drivers first · 1M · residual 5.4bp within 60bp gate

The S&P 500 rose 2.90% (+220 pts) on the month, but 280 of 503 members went the other way. MSFT and NVDA carried the tape higher, accounting for 40% of the gain.

Read the latest market-close note: Goldman and Microsoft Push the Dow to a Large Gain While Telecoms Sink Communication Services

+353.4 pts from 218 gainers−133.0 pts from 285 losers

net +219.8 pts · gainers outweigh losers 2.7 to 1

Stock

Points

Return

S&P 500sum of all 503 stocks

+219.8

+2.90%

MSFTMICROSOFT CORP

+35.4

+8.66%

NVDANVIDIA CORP

+31.1

+5.00%

AMDADVANCED MICRO DEVICES

+20.9

+20.75%

METAMETA PLATFORMS INC CLASS A

+20.5

+11.61%

AAPLAPPLE INC

+16.9

+3.08%

GOOGLALPHABET INC CL A

+13.3

+5.73%

AMZNAMAZON.COM INC

+11.9

+4.18%

PLTRPALANTIR TECHNOLOGIES INC A

+11.2

+26.04%

GOOGALPHABET INC CL C

+9.9

+5.29%

CRWDCROWDSTRIKE HOLDINGS INC A

+7.5

+31.69%

PANWPALO ALTO NETWORKS INC

+7.2

+23.72%

MUMICRON TECHNOLOGY INC

+7.1

+5.28%

TSLATESLA INC

+6.2

+5.26%

LLYELI LILLY + CO

+5.7

+4.96%

CSCOCISCO SYSTEMS INC

+5.2

+10.60%

473 othersclick to expand the full index

+58.2

WFCWELLS FARGO + CO

−2.0

−6.58%

TMUST MOBILE US INC

−2.0

−16.13%

HDHOME DEPOT INC

−2.0

−4.89%

SCHWSCHWAB (CHARLES) CORP

−2.0

−9.89%

STXSEAGATE TECHNOLOGY HOLDINGS

−2.1

−9.13%

SNDKSANDISK CORP

−2.2

−6.54%

ORCLORACLE CORP

−2.4

−7.46%

WDCWESTERN DIGITAL CORP

−2.8

−13.81%

NFLXNETFLIX INC

−3.0

−7.51%

TAT+T INC

−3.2

−13.23%

MSMORGAN STANLEY

−3.2

−10.65%

GSGOLDMAN SACHS GROUP INC

−4.3

−12.20%

VZVERIZON COMMUNICATIONS INC

−4.5

−16.65%

JPMJPMORGAN CHASE + CO

−5.7

−5.35%

BACBANK OF AMERICA CORP

−6.1

−13.19%

Cap weighting, illustrated

APPLE INC and UNIVERSAL HEALTH SERVICES B moved almost identically (+3.08% vs +2.70%), yet AAPL moved the S&P 500 666.0× as much. In a cap-weighted index, the bigger company's weight turns the same percentage move into far more points.

Attribution map

slicing the +220 pt move · cell size = points contributed · color = direction, intensity = return

MSFT+35.4 pts(+8.7%)

NVDA+31.1 pts(+5.0%)

AMD+20.9 pts(+20.8%)

META+20.5 pts(+11.6%)

383 more−17.5 pts

AAPL+16.9 pts(+3.1%)

GOOGL+13.3 pts(+5.7%)

AMZN+11.9 pts(+4.2%)

PLTR+11.2 pts

GOOG+9.9 pts

CRWD

PANW

TSLA+6.2 pts

BAC−6.1 pts

JPM

LLY

CSCO+5.2 pts

MRVL+4.9 pts

ABBV

ANET

MRNA

INTC

WDC

HPE

KLAC

GEV

ISRG

TXN

TMO

SNPS

WMT

ORCL

CDNS

SNDK

STX

MPC

TMUS

WFC

RTX

CMCSA

BRK-B

VLO

LITE

PWR

DHR

Concentration curve

cumulative share of the +220 pt move · sorted by contribution

When they drove it

cumulative points through the period

Breadth

member returns, this period

−50%−25%0%+25%+50%

From −30.49% (FICO) to +64.69% (MRNA). Equal-weight, the S&P 500 would be +0.29% vs the actual +2.90%; the gap is what cap weighting did.

By sector

point contribution · sums to +220 pts

-503

+220.4

The year, session by session

every trading day of 2026 · hover for the move

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