XLK · WMTMT

Sep 10Sep 17Sep 25Oct 2Oct 9

Breadth

55 / 75

stocks rose with the index

Concentration

37%

of the gain from AMD, MSFT, NVDA

Biggest driver

AMD +1.77

ADVANCED MICRO DEVICES, +20.75%

Biggest drag

WDC −0.30

WESTERN DIGITAL CORP, −13.81%

What drove it

75 members · drivers first · 1M · residual 9.4bp within 60bp gate

The XLK rose 7.32% (+13.56 pts) on the month in a broad advance: 55 of 75 stocks rose, with AMD out front at +1.77 points.

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

+15.2 pts from 56 gainers−1.6 pts from 19 losers

net +13.6 pts · gainers outweigh losers 9.3 to 1

Stock

Points

Return

XLKsum of all 75 stocks

+13.6

+7.32%

AMDADVANCED MICRO DEVICES

+1.8

+20.75%

MSFTMICROSOFT CORP

+1.8

+8.66%

NVDANVIDIA CORP

+1.5

+5.00%

AAPLAPPLE INC

+1.2

+3.08%

PLTRPALANTIR TECHNOLOGIES INC A

+1.1

+26.04%

CRWDCROWDSTRIKE HOLDINGS INC A

+0.7

+31.69%

PANWPALO ALTO NETWORKS INC

+0.7

+23.72%

CSCOCISCO SYSTEMS INC

+0.5

+10.60%

MUMICRON TECHNOLOGY INC

+0.5

+5.28%

MRVLMARVELL TECHNOLOGY INC

+0.4

+21.29%

ANETARISTA NETWORKS INC

+0.3

+14.70%

AMATAPPLIED MATERIALS INC

+0.3

+11.68%

HPEHEWLETT PACKARD ENTERPRISE

+0.3

+33.27%

DELLDELL TECHNOLOGIES C

+0.3

+15.71%

DDOGDATADOG INC CLASS A

+0.3

+32.27%

45 othersclick to expand the full index

+3.7

HPQHP INC

−0.0

−7.73%

ROPROPER TECHNOLOGIES INC

−0.0

−6.06%

AVGOBROADCOM INC

−0.0

+0.38%

MSIMOTOROLA SOLUTIONS INC

−0.0

−4.03%

FSLRFIRST SOLAR INC

−0.0

−14.17%

ADBEADOBE INC

−0.0

−2.64%

GENGEN DIGITAL INC

−0.0

−22.41%

FICOFAIR ISAAC CORP

−0.0

−30.49%

IBMINTL BUSINESS MACHINES CORP

−0.1

−2.94%

GLWCORNING INC

−0.1

−3.95%

CRMSALESFORCE INC

−0.1

−5.54%

SNDKSANDISK CORP

−0.2

−6.54%

STXSEAGATE TECHNOLOGY HOLDINGS

−0.2

−9.13%

ORCLORACLE CORP

−0.3

−7.46%

WDCWESTERN DIGITAL CORP

−0.3

−13.81%

Cap weighting, illustrated

NVIDIA CORP and TRIMBLE INC moved almost identically (+5.00% vs +5.72%), yet NVDA moved the XLK 150.4× 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 +13.56 pt move · cell size = points contributed · color = direction, intensity = return

AMD+1.8 pts(+20.8%)

MSFT+1.8 pts(+8.7%)

NVDA+1.5 pts(+5.0%)

AAPL+1.2 pts(+3.1%)

PLTR+1.1 pts(+26.0%)

CRWD+0.7 pts(+31.7%)

PANW+0.7 pts

CSCO+0.5 pts(+10.6%)

MU+0.5 pts

MRVL+0.4 pts

ANET+0.3 pts(+14.7%)

AMAT+0.3 pts(+11.7%)

WDC−0.3 pts(−13.8%)

HPE+0.3 pts

ORCL−0.3 pts

DELL

DDOG+0.3 pts

INTC+0.2 pts

FTNT+0.2 pts

STX−0.2 pts

SNPS

SNDK−0.2 pts

ADI+0.2 pts

CDNS

APH

KLAC

LRCX

ACN+0.2 pts

CIEN+0.2 pts

LITE

CRM

NTAP

MPWR

Concentration curve

cumulative share of the +13.56 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 +64.23% (P). Equal-weight, the XLK would be +9.00% vs the actual +7.32%; the gap is what cap weighting did.

By sector

point contribution · sums to +13.56 pts

-75

+13.6

The year, session by session

every trading day of 2026 · hover for the move

JANFEBMARAPRMAYJUNJULAUGSEPOCT

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What drove it

Attribution map

Concentration curve

When they drove it

Breadth

By sector

The year, session by session

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