Historically, stocks mostly trade above these long-term trend indicators in a roaring bull market. In the event of declines such as the current one, they tend to fall below the 200-DMA, an indication of deep-rooted weakness in the market. The 200-DMA signifies a stock’s trend over the past year. A year has roughly 200 trading sessions. Historically, stocks mostly trade above these long-term trend indicators in a roaring bull market. In the event of declines such as the current one, they tend to fall below the 200-DMA, an indication of deep-rooted weakness in the market. The 200-DMA signifies a stock’s trend over the past year. A year has roughly 200 trading sessions. Economic Times