Market Breadth Breakdown: Why the Market Has “Bad Breadth” in March 2026

The S&P 500 may look stable, but market breadth is quietly deteriorating. Dave Keller breaks down key breadth indicators and explains why weakening participation could signal trouble ahead. Dave Keller explains why market breadth conditions have deteriorated even while the S&P 500 and Nasdaq have remained relatively flat in early 2026. Using indicators like cumulative advance-decline lines, moving-average breadth, and bullish percent indexes, he shows how fewer stocks are participating in the market’s trend and why participation matters for the sustainability of a rally. Dave also compares equal-weighted versus cap-weighted performance and highlights key technical levels and momentum signals that could confirm whether weakening breadth leads to broader market downside. LINKS Dave's daily market recap show: http://marketmisbehavior.com/premium StockCharts market summary page: https://stockcharts.com/freecharts/marketsummary.html 00:00 - Welcome 01:57 - Advance-Decline Lines Explained 05:28 - Understanding Market Participation & Breadth 06:04 - Moving Average Breadth (% Above 200 & 50 Day) 09:16 - Bullish Percent Index (Nasdaq vs S&P) 11:18 - Breadth Impact on S&P 500 Price Action 13:29 - Equal-Weighted vs Cap-Weighted S&P 500 15:56 - Nvidia as a Key Market Driver 18:05 - Tracking Breadth on StockCharts & Final Tips 👀 See what better financial charting can do for you! https://stockcharts.com/?utm_source=YouTube&utm_medium=Organicvideo&utm_campaign=DavidKeller&utm_content=031226 👍🏻 If you enjoyed this video be sure to hit the THUMBS UP ✅ If you found value, consider SUBSCRIBING to our channel and ring the bell so you never miss a new video! Subscribe Here: https://tinyurl.com/wvet7qj 👍🏻 FOLLOW US X - @StockCharts - https://x.com/stockcharts Facebook - https://www.facebook.com/stockchartsdotcom LinkedIn - https://www.linkedin.com/company/stockcharts.com-inc. #davidkeller #davekeller #marketbreadth @StockChartsTV @DKellerCMT ❗️DISCLAIMER Past performance is not indicative of future results. Neither the Show Participants nor StockCharts.com guarantee any specific outcome or profit. You should be aware of the real risk of loss in following any strategy or investment discussed on the show. Strategies or investments discussed may fluctuate in price or value. Investments or strategies mentioned in this show may not be suitable for you and you should make your own independent decision regarding them. This material does not take into account your particular investment objectives, financial situation or needs and is not intended as recommendations appropriate for you. You should strongly consider seeking advice from your own investment advisor ––––– ℹ️ ABOUT STOCKCHARTS StockCharts.com is the world's leading technical analysis and financial charting platform. Trusted by millions of online investors around the world, the company has been an industry leader in the financial technology space for more than two decades. With innovative, award-winning charting and analysis tools, our mission is to help you better analyze the markets, monitor and manage your portfolios, find promising new stocks and funds to buy, and ultimately make smarter investment decisions. ℹ️ ABOUT STOCKCHARTS TV StockCharts TV is devoted exclusively to financial charting and market analysis from the web's top technical experts. With a constant stream of technical charting-focused content, there's always something insightful, educational and entertaining to watch on the channel.