Alphabet Inc. and Fastenal Company moved almost identically (+2.20% vs +2.46%), yet GOOGL moved the NASDAQ 100 325.0× 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 +475 pt move · cell size = points contributed · color = direction, intensity = return
AMZN+108.3 pts(+5.3%)
MSFT+82.3 pts(+4.3%)
AAPL+70.3 pts(+1.1%)
GOOGL+66.4 pts(+2.2%)
GOOG+61.6 pts(+2.1%)
META−55.3 pts(−0.9%)
NVDA−54.2 pts(+0.4%)
INTC−44.8 pts
WMT+42.4 pts(+7.1%)
TSLA+40.1 pts(+7.9%)
PLTR+35.9 pts(+11.8%)
ARM−24.9 pts(−8.1%)
MU+23.3 pts
ASML−21.5 pts
CSCO
SHOP+17.2 pts
STX−17.0 pts
AVGO+15.5 pts
WDC
AMD−12.8 pts
COST+12.1 pts
QCOM−9.1 pts
SNPS+8.6 pts
CEG
SNDK
CRWD
TMUS
INTU
ISRG
TXN
NFLX
FTNT
GILD
LITE
SBUX
Concentration curve
cumulative share of the +475 pt move · sorted by contribution
When they drove it
cumulative points through the period
Breadth
member returns, this period
−20%−10%0%+10%
From −15.11% (STX) to +17.34% (CEG). Equal-weight, the NASDAQ 100 would be +1.83% vs the actual +1.56%; the gap is what cap weighting did.
By sector
point contribution · sums to +475 pts
Unknown101
+324.7
The year, session by session
every trading day of 2026 · hover for the move
JANFEBMARAPRMAYJUNJULAUGSEPOCT
Share this move
pick a view, download it as a 16:9 PNG
Nasdaq-100
What moved the market
QTD · OCT 9, 2026
+1.56%
+474.7 pts · closed 30,883.15
65 of 101 rose · 36 fell
AMZN+5.3%
+108.3
MSFT+4.3%
+82.3
AAPL+1.1%
+70.3
GOOGL+2.2%
+66.4
GOOG+2.1%
+61.6
ASML−1.7%
−21.5
ARM−8.1%
−24.9
INTC−12.9%
−44.8
NVDA+0.4%
−54.2
META−0.9%
−55.3
3 stocks drove 55% of the gain: AMZN, MSFT, AAPLWMTMT.COM
view 1 of 6
Cycle through the views and download any of them as a 16:9 PNG sized for X. Pasting the page link on X unfurls a server-rendered card on its own.
www.wmtmt.com/ndx?p=qtd
Share on X copies the image to your clipboard and opens the composer; paste to attach it.
What moved the market, in your inbox
The daily note publishes here after every close; the week's story lands in your inbox on Fridays, free. Read the daily notes.
Babylon Burns
WMTMT is built by the founders of Babylon Burns, a letter on markets, macro, and the systems behind them. The numbers live here; the arguments live there. Subscribing below joins the Babylon Burns letter.