SPX Market Breadth — MBAD

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 of2026-08-18 Resolved502 / 504 SPX -0.67%
Stocks Up:224
Stocks Down:275
SPX Daily: -0.67%
Avg Daily:-0.45%
Avg Gain:+1.33%
Avg Decline:-1.91%
Avg Decline -1.91%Avg Daily -0.45%Avg Gain +1.33% -10%-5%+0%+5%+10% NVDA-2.34%AAPL+1.45%MSFT+0.27%AMZN-0.71%GOOGL+0.06%GOOG-0.05%AVGO-3.17%TSLA-0.72%META-4.45%MU-7.02%LLY+3.60%JPM+0.63%WMT+0.76%AMD-4.27%BRK.B+0.95%SNDK-9.01%STX-9.16%MRVL-7.82%LITE-9.87%TER-8.77%COHR-12.75%CIEN-8.90%JBL-8.45% Unweighted distribution (down / up) Weighted (cap-weighted) Daily return (%)

SPX Constituents Relative Impact By Market Cap

Largest Positive Impact
Top ContributorDaily %Impact Share% Weight
AAPL+1.45%4.98%6.48%
LLY+3.60%3.08%1.62%
JNJ+3.33%1.62%0.92%
XOM+2.54%1.30%0.96%
ABBV+3.43%1.17%0.64%
MA+2.14%0.81%0.71%
MSFT+0.27%0.73%5.18%
V+1.51%0.71%0.89%
KO+2.12%0.61%0.54%
NFLX+2.30%0.57%0.46%
Largest Negative Impact
Top DetractorDaily %Impact Share% Weight
NVDA-2.34%9.80%7.91%
MU-7.02%6.16%1.66%
AVGO-3.17%4.54%2.71%
META-4.45%4.29%1.82%
AMD-4.27%2.71%1.20%
INTC-6.58%2.64%0.76%
SNDK-9.01%1.83%0.38%
STX-9.16%1.59%0.33%
AMZN-0.71%1.54%4.09%
LRCX-4.63%1.53%0.62%