death cross

A bearish technical chart pattern occurring when a short-term moving average crosses below a long-term moving average.

A death cross is a bearish technical chart pattern that occurs when a security's short-term moving average crosses below its long-term moving average. Most commonly, technical analysts look for the 50-day moving average to cross below the 200-day moving average. This crossover is widely watched because it signals that short-term price momentum is deteriorating rapidly relative to the long-term trend. Investors and traders monitor the death cross as a lagging indicator to confirm a structural transition from a bull market to a bear market. Because moving averages are based on historical price data, the crossover occurs well after a stock or index has already begun to decline from its peak. Consequently, it is used more for trend confirmation rather than timing the exact top of a market. While a death cross can warn of prolonged market weakness, it is not a perfect predictive tool. In range-bound or volatile markets, it can produce false signals, known as whipsaws, where the averages cross and then quickly reverse. To avoid these pitfalls, market participants often look for supporting evidence, such as high trading volume on the day of the crossover or broader macroeconomic weakness.

Suppose the S&P 500 index has been in a correction. Its 50-day moving average steadily declines to 4,150, while its slower-moving 200-day moving average sits at 4,155. When the 50-day moving average drops to 4,148 the next day, crossing below the 200-day moving average of 4,152, a death cross is officially triggered.