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 of2026-08-19 Resolved503 / 504 SPX +0.26%
Stocks Up:285
Stocks Down:217
SPX Daily: +0.26%
Avg Daily:+0.90%
Avg Gain:+2.98%
Avg Decline:-1.84%
Avg Decline -1.84%Avg Daily +0.90%Avg Gain +2.98% -170%-160%-150%-140%-130%-120%-110%-100%-90%-80%-70%-60%-50%-40%-30%-20%-10%+0%+10%+20%+30%+40%+50%+60%+70%+80%+90%+100%+110%+120%+130%+140%+150%+160%+170% NVDA-0.99%AAPL+2.19%MSFT+0.56%AMZN+2.46%GOOGL+0.15%GOOG+0.12%AVGO-4.61%TSLA+4.23%META+0.43%LLY+4.46%MU-0.39%JPM-1.65%WMT-0.78%AMD-3.71%BRK.B-0.62%MRK+12.60%STX-7.87%MRVL+9.85%CVNA+8.37%COIN+9.55%MRNA+176.97%EL+16.30%ARE+10.27% 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+2.19%7.08%6.61%
AMZN+2.46%4.92%4.09%
TSLA+4.23%4.02%1.94%
LLY+4.46%3.67%1.69%
MRNA+176.97%3.18%0.04%
MRK+12.60%3.00%0.49%
MSFT+0.56%1.42%5.23%
MRVL+9.85%1.33%0.28%
ABBV+2.72%0.89%0.67%
NFLX+3.15%0.74%0.48%
Largest Negative Impact
Top DetractorDaily %Impact Share% Weight
AVGO-4.61%5.95%2.64%
NVDA-0.99%3.77%7.77%
AMD-3.71%2.09%1.16%
LRCX-6.33%1.85%0.60%
INTC-4.02%1.40%0.71%
GE-5.03%1.40%0.57%
STX-7.87%1.15%0.30%
JPM-1.65%1.14%1.41%
AMAT-3.53%1.03%0.60%
WDC-6.87%0.84%0.25%
Generated by scripts.generate_breadth_html from dashboard/breadth_feed.json. Constituents from spx_constituents.yaml. Re-run run_breadth.command for a fresh pull.