
The S&P 500 Index, as tracked by SPDR S&P 500 ETF Trust (NYSEARCA: SPY), and the Nasdaq-100 Index, as tracked by the Invesco QQQ (NASDAQ: QQQ), have both triggered a widely-followed bearish chart pattern known as the Death Cross.
A Death Cross occurs when a 50-day simple moving average (SMA) trendline crosses below the 200-day SMA trendline.