Why is Natl. Aluminium falling/rising?

As of 17-Sep, National Aluminium Company Ltd's stock price is currently at Rs 213.10, reflecting a decrease of Rs 3.3 or 1.52%. The stock has been underperforming, having fallen for the last three consecutive days, with a total decline of 2.36% during this period. Today's performance shows that it underperformed its sector by 0.62%, and it reached an intraday low of Rs 211.65. Despite its strong historical performance, including a 14.20% return over the past year and a significant annual growth in operating profit, the stock is currently experiencing a decline, which may be influenced by falling investor participation, as evidenced by an 11.87% drop in delivery volume against the 5-day average.
In the broader market context, the stock's recent performance contrasts with the Sensex, which has shown a 1.56% increase over the past week. While National Aluminium has outperformed the benchmark over longer periods, including a 1-month return of 13.74% compared to the Sensex's 2.60%, the current short-term decline suggests a shift in investor sentiment. Factors such as high management efficiency, low debt levels, and consistent returns over the last three years indicate strong fundamentals; however, the recent drop in delivery volume and consecutive days of decline may be causing concern among investors, leading to the current price movement.