Tesla, Inc. and O'Reilly Automotive, Inc. moved almost identically (−12.76% vs −14.20%), yet TSLA moved the NASDAQ 100 799.9× 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 +5,747 pt move · cell size = points contributed · color = direction, intensity = return
AAPL+1,433.1 pts(+30.8%)
GOOGL+989.6 pts(+44.0%)
GOOG+886.2 pts(+42.0%)
NVDA−879.2 pts(+21.4%)
MSFT+579.9 pts(+2.6%)
MU+473.6 pts(+424.0%)
AMZN+435.0 pts
TSLA−203.0 pts
AVGO
INTC+183.2 pts(+179.7%)
AMD+177.4 pts(+158.2%)
PANW+158.9 pts
SNDK+124.5 pts
PLTR
CRWD
CSCO
NFLX
META
STX
FTNT
APP
SPCX
MSTR
INTU
AMGN
MRNA
WMT
CEG
WDC
COST
Concentration curve
cumulative share of the +5,747 pt move · sorted by contribution
When they drove it
cumulative points through the period
Breadth
member returns, this period
−100%+100%+300%+500%+700%+900%
From −56.00% (APP) to +1,099.44% (SNDK). Equal-weight, the NASDAQ 100 would be +36.23% vs the actual +22.86%; the gap is what cap weighting did.
By sector
point contribution · sums to +5,747 pts
Unknown101
+4,577.0
The year, session by session
every trading day of 2026 · hover for the move
JANFEBMARAPRMAYJUNJULAUGSEPOCT
Share this move
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Nasdaq-100
What moved the market
1Y · OCT 9, 2026
+22.86%
+5,746.5 pts · closed 30,883.15
66 of 101 rose · 35 fell
AAPL+30.8%
+1,433.1
GOOGL+44.0%
+989.6
GOOG+42.0%
+886.2
MSFT+2.6%
+579.9
MU+424.0%
+473.6
META+0.4%
−78.1
NFLX−42.1%
−98.7
AVGO+5.2%
−185.6
TSLA−12.8%
−203.0
NVDA+21.4%
−879.2
3 stocks drove 58% of the gain: AAPL, GOOGL, GOOGWMTMT.COM
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