On February 12, 14 stocks from the Nifty500 index closed below their 200-day moving averages (200 DMA), according to data from StockEdge.com. This is important because trading below the 200 DMA is seen as a negative signal. It means the stock price is lower than its long-term trend. Traders use the 200 DMA as a major indicator to judge a stock's overall trend. Such a drop warns investors that these stocks might be weakening in strength.