SPX Market Breadth

Distribution of constituent daily returns vs. their cap-weighted contribution to the index. Where the curves diverge, the index is being pushed by names that are out of sync with the broader market.

As of2026-09-18 Coverage503 of 504 constituents SPX +0.15%
Stocks Up:156
Stocks Down:346
SPX Daily: +0.15%
Avg Daily:-0.45%
Avg Gain:+1.51%
Avg Decline:-1.33%
Avg Decline -1.33%Avg Daily -0.45%Avg Gain +1.51% -10%-5%+0%+5%+10% NVDA+1.34%AAPL-0.26%MSFT-0.80%AMZN+1.00%GOOGL+0.64%GOOG+0.21%AVGO+2.97%META-2.43%TSLA-0.53%MU+3.92%LLY+0.04%JPM+0.10%AMD+2.70%WMT-0.06%BRK.B+0.11%LRCX+6.98%AMAT+6.51%SNDK+10.99%STX+6.93%HOOD+9.12%NUE-6.32%COHR+7.22%COIN+11.66% Unweighted distribution (down / up) Weighted (cap-weighted) Daily return (%)

SPX Constituents Relative Impact By Market Cap

Largest Positive Impact
Top ContributorDaily %Impact Share% Weight
NVDA+1.34%8.36%7.78%
AVGO+2.97%5.83%2.44%
MU+3.92%5.12%1.62%
AMZN+1.00%3.22%3.99%
SNDK+10.99%3.08%0.35%
AMD+2.70%2.85%1.31%
LRCX+6.98%2.79%0.50%
AMAT+6.51%2.55%0.49%
GOOGL+0.64%1.54%3.00%
STX+6.93%1.50%0.27%
Largest Negative Impact
Top DetractorDaily %Impact Share% Weight
META-2.43%4.32%2.21%
MSFT-0.80%3.49%5.44%
NFLX-4.67%1.75%0.47%
AAPL-0.26%1.50%7.24%
QCOM-5.82%1.37%0.29%
PANW-3.06%1.11%0.45%
ORCL-1.98%1.07%0.67%
CRWD-3.28%0.98%0.37%
IBM-3.45%0.91%0.33%
TSLA-0.53%0.90%2.13%