S&P 500 Bull & Bear Radar — August 17, 2026
· Stocks · QuoteReporter
S&P 500 Bull & Bear Radar — August 17, 2026
A daily technical sweep of 494 S&P 500 constituents ranked by session performance, enriched with RSI, MA20/MA50/MA200 trend signals, Bloomberg-style charts, and recent news.
Index-Wide Breadth
| Constituents tracked | 494 |
| Advancing | 164 (33.2%) |
| Declining | 327 (66.2%) |
| Average daily change | 0.47% |
| Above MA200 | 13 (2.6%) |
Top 10 Gainers
Today's strongest S&P 500 performers. Sector leadership: Technology (8), Industrials (2).
| Ticker | Company | Sector | Price | Day % | 1W % | 1M % | RSI | vs MA200 | Trend |
|---|---|---|---|---|---|---|---|---|---|
| WDC | Western Digital Corp | Technology | $537.82 | +5.70% | +22.88% | +12.87% | 54.5 | +52.9% | Above MA20, MA200 · Below MA50 |
| AMAT | Applied Materials Inc | Technology | $531.78 | +4.85% | +1.86% | +0.41% | 49.5 | +36.3% | Above MA20, MA200 · Below MA50 |
| MU | Micron Technology Inc | Technology | $1013.85 | +4.34% | +17.78% | +19.45% | 59.7 | +82.2% | Above MA20, MA50, MA200 |
| TER | Teradyne, Inc | Technology | $431.79 | +3.10% | +18.32% | +34.01% | 62.8 | +42.4% | Above MA20, MA50, MA200 |
| JBHT | J.B. Hunt Transport Services, Inc | Industrials | $287.76 | +2.88% | +8.12% | -1.25% | 58.8 | +24.8% | Above MA20, MA50, MA200 |
| ON | ON Semiconductor Corp | Technology | $85.02 | +2.86% | +6.54% | -2.71% | 48.1 | +11.0% | Above MA20, MA200 · Below MA50 |
| GLW | Corning, Inc | Technology | $169.83 | +2.31% | +7.76% | +9.95% | 53.8 | +21.9% | Above MA20, MA200 · Below MA50 |
| PWR | Quanta Services, Inc | Industrials | $701.63 | +2.31% | +6.17% | +11.63% | 59.0 | +22.1% | Above MA20, MA50, MA200 |
| MCHP | Microchip Technology, Inc | Technology | $80.89 | +2.18% | -0.57% | -0.04% | 50.0 | +6.1% | Above MA20, MA200 · Below MA50 |
| MPWR | Monolithic Power System Inc | Technology | $1431.20 | +2.08% | +3.63% | +9.09% | 55.1 | +16.4% | Above MA20, MA50, MA200 |
WDC | Western Digital Corp | Technology | Price: $537.82 | Day: +5.70% | 1W: +22.88% | 1M: +12.87% | RSI: 54.5 | vs MA200: +52.9% | Trend: Above MA20, MA200 · Below MA50
Recent headlines (last 12h)
- Sandisk Stock Is Getting Its Mojo Back Amid China Memory-Chip Move
- SanDisk Stock Locks In $94B Backlog, Targets 80% Margins by 2030
AMAT | Applied Materials Inc | Technology | Price: $531.78 | Day: +4.85% | 1W: +1.86% | 1M: +0.41% | RSI: 49.5 | vs MA200: +36.3% | Trend: Above MA20, MA200 · Below MA50
Recent headlines (last 12h)
- S&P 500 nears record as weak retail data and Iran tensions shape critical week
MU | Micron Technology Inc | Technology | Price: $1013.85 | Day: +4.34% | 1W: +17.78% | 1M: +19.45% | RSI: 59.7 | vs MA200: +82.2% | Trend: Above MA20, MA50, MA200
Recent headlines (last 12h)
- Tech searches for gains as stocks teeter at the open: AlphaCheck
- Micron rises as White House presses Apple to avoid Chinese memory chips
- Oracle, Software Stocks Fall as AI Trade Seesaws
- Stock Market Today: Dow Falls, Nasdaq Rises As Memory Chip Stocks Micron, Sandisk Extend Gains (Live Coverage)
TER | Teradyne, Inc | Technology | Price: $431.79 | Day: +3.10% | 1W: +18.32% | 1M: +34.01% | RSI: 62.8 | vs MA200: +42.4% | Trend: Above MA20, MA50, MA200
JBHT | J.B. Hunt Transport Services, Inc | Industrials | Price: $287.76 | Day: +2.88% | 1W: +8.12% | 1M: -1.25% | RSI: 58.8 | vs MA200: +24.8% | Trend: Above MA20, MA50, MA200
ON | ON Semiconductor Corp | Technology | Price: $85.02 | Day: +2.86% | 1W: +6.54% | 1M: -2.71% | RSI: 48.1 | vs MA200: +11.0% | Trend: Above MA20, MA200 · Below MA50
GLW | Corning, Inc | Technology | Price: $169.83 | Day: +2.31% | 1W: +7.76% | 1M: +9.95% | RSI: 53.8 | vs MA200: +21.9% | Trend: Above MA20, MA200 · Below MA50
PWR | Quanta Services, Inc | Industrials | Price: $701.63 | Day: +2.31% | 1W: +6.17% | 1M: +11.63% | RSI: 59.0 | vs MA200: +22.1% | Trend: Above MA20, MA50, MA200
MCHP | Microchip Technology, Inc | Technology | Price: $80.89 | Day: +2.18% | 1W: -0.57% | 1M: -0.04% | RSI: 50.0 | vs MA200: +6.1% | Trend: Above MA20, MA200 · Below MA50
MPWR | Monolithic Power System Inc | Technology | Price: $1431.20 | Day: +2.08% | 1W: +3.63% | 1M: +9.09% | RSI: 55.1 | vs MA200: +16.4% | Trend: Above MA20, MA50, MA200
Recent headlines (last 12h)
- Did Monolithic Power Systems, Inc. Insiders Breach their Fiduciary Duties to Shareholders?
Top 10 Losers
Today's weakest S&P 500 performers. Sector drag: Consumer Defensive (3), Healthcare (2), Technology (2), Industrials (1), Communication Services (1), Real Estate (1).
| Ticker | Company | Sector | Price | Day % | 1W % | 1M % | RSI | vs MA200 | Trend |
|---|---|---|---|---|---|---|---|---|---|
| BLDR | Builders Firstsource Inc | Industrials | $70.11 | -3.31% | -2.45% | -5.45% | 44.2 | -24.6% | Below MA20, MA50, MA200 |
| TTD | Trade Desk Inc | Communication Services | $13.67 | -3.32% | +2.05% | -26.49% | 32.7 | -49.9% | Below MA20, MA50, MA200 |
| CSGP | Costar Group, Inc | Real Estate | $31.29 | -3.37% | -0.60% | +5.07% | 54.1 | -32.4% | Above MA20, MA50 · Below MA200 |
| CNC | Centene Corp | Healthcare | $65.18 | -3.40% | -2.12% | -1.93% | 50.3 | +35.0% | Above MA20, MA50, MA200 |
| DELL | Dell Technologies Inc | Technology | $473.92 | -3.44% | +3.61% | +19.69% | 57.5 | +104.8% | Above MA20, MA50, MA200 |
| KDP | Keurig Dr Pepper Inc | Consumer Defensive | $30.35 | -3.45% | +3.53% | -1.86% | 48.0 | +5.5% | Above MA200 · Below MA20, MA50 |
| ZTS | Zoetis Inc | Healthcare | $71.24 | -3.46% | -4.80% | -6.95% | 39.9 | -33.2% | Below MA20, MA50, MA200 |
| IT | Gartner, Inc | Technology | $174.79 | -3.48% | -9.51% | +24.68% | 56.8 | -3.2% | Above MA20, MA50 · Below MA200 |
| TAP | Molson Coors Beverage Company | Consumer Defensive | $40.98 | -4.19% | -3.69% | +0.05% | 46.9 | -7.6% | Above MA50 · Below MA20, MA200 |
| STZ | Constellation Brands Inc | Consumer Defensive | $132.37 | -4.90% | -0.83% | -0.44% | 46.7 | -8.7% | Above MA20 · Below MA50, MA200 |
BLDR | Builders Firstsource Inc | Industrials | Price: $70.11 | Day: -3.31% | 1W: -2.45% | 1M: -5.45% | RSI: 44.2 | vs MA200: -24.6% | Trend: Below MA20, MA50, MA200
TTD | Trade Desk Inc | Communication Services | Price: $13.67 | Day: -3.32% | 1W: +2.05% | 1M: -26.49% | RSI: 32.7 | vs MA200: -49.9% | Trend: Below MA20, MA50, MA200
CSGP | Costar Group, Inc | Real Estate | Price: $31.29 | Day: -3.37% | 1W: -0.60% | 1M: +5.07% | RSI: 54.1 | vs MA200: -32.4% | Trend: Above MA20, MA50 · Below MA200
CNC | Centene Corp | Healthcare | Price: $65.18 | Day: -3.40% | 1W: -2.12% | 1M: -1.93% | RSI: 50.3 | vs MA200: +35.0% | Trend: Above MA20, MA50, MA200
Recent headlines (last 12h)
- Centene Announces Planned Chief Financial Officer Transition
DELL | Dell Technologies Inc | Technology | Price: $473.92 | Day: -3.44% | 1W: +3.61% | 1M: +19.69% | RSI: 57.5 | vs MA200: +104.8% | Trend: Above MA20, MA50, MA200
KDP | Keurig Dr Pepper Inc | Consumer Defensive | Price: $30.35 | Day: -3.45% | 1W: +3.53% | 1M: -1.86% | RSI: 48.0 | vs MA200: +5.5% | Trend: Above MA200 · Below MA20, MA50
ZTS | Zoetis Inc | Healthcare | Price: $71.24 | Day: -3.46% | 1W: -4.80% | 1M: -6.95% | RSI: 39.9 | vs MA200: -33.2% | Trend: Below MA20, MA50, MA200
IT | Gartner, Inc | Technology | Price: $174.79 | Day: -3.48% | 1W: -9.51% | 1M: +24.68% | RSI: 56.8 | vs MA200: -3.2% | Trend: Above MA20, MA50 · Below MA200
Recent headlines (last 12h)
- Only one-quarter of AI customer service use cases produce ROI
TAP | Molson Coors Beverage Company | Consumer Defensive | Price: $40.98 | Day: -4.19% | 1W: -3.69% | 1M: +0.05% | RSI: 46.9 | vs MA200: -7.6% | Trend: Above MA50 · Below MA20, MA200
STZ | Constellation Brands Inc | Consumer Defensive | Price: $132.37 | Day: -4.90% | 1W: -0.83% | 1M: -0.44% | RSI: 46.7 | vs MA200: -8.7% | Trend: Above MA20 · Below MA50, MA200
Market Commentary
Today's S&P 500 session reflected a bearish tone, with 327 decliners (66.2%) outpacing 164 advancers (33.2%). This significant imbalance indicates a market struggling to find upward momentum, as only 13 stocks (2.6%) are above their 200-day moving average. The average daily change of 0.47% further underscores the lack of strong directional movement, suggesting traders are cautious amid prevailing market conditions.
Sector rotation is evident, with technology stocks dominating the top gainers list, including WDC, AMAT, and MU. Conversely, the top losers span multiple sectors, notably communication services and healthcare, with BLDR and TTD leading the decline. This divergence highlights a potential shift in investor sentiment, favoring growth-oriented sectors while penalizing more defensive or cyclical stocks.
Traders should closely monitor key risk levels, particularly the performance of stocks above their 200-day moving average. A sustained decline below this threshold could signal further weakness, while any rebound in the advancing stocks could indicate a shift in market sentiment. Upcoming earnings reports and economic data releases will be critical catalysts to watch for confirming or invalidating current trends.
Methodology
Daily ranking uses the latest session close versus the prior close. RSI (14-day EWM), MA20, MA50, and MA200 are computed from 12 months of daily OHLCV data sourced from Yahoo Finance. Charts show the last 120 trading sessions with SMA 20/50, 52-week H/L markers, and volume. Recent news (last 12 h) is sourced from FinViz. Updated every trading day.
Disclaimer
The content on MarketsFN.com is provided for educational and informational purposes only. It does not constitute financial advice, investment recommendations, or trading guidance. All investments involve risks, and past performance does not guarantee future results. You are solely responsible for your investment decisions and should conduct independent research and consult a qualified financial advisor before acting. MarketsFN.com and its authors are not liable for any losses or damages arising from your use of this information.
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