Why is Sterlite Tech. falling/rising?

As of 24-Sep, Sterlite Technologies Ltd is experiencing a decline in its stock price, currently at 122.40, which reflects a decrease of 1.1 or 0.89%. Despite this drop, the stock has outperformed its sector by 0.81% today. The stock's performance over the past week shows a slight decline of 1.17%, while it has significantly outperformed the broader market with a year-to-date return of 42.94% compared to the Sensex's 4.58%. However, the stock's recent trading activity indicates a falling investor participation, with a delivery volume decrease of 21.38% against the 5-day average, which may contribute to the downward pressure on the stock price.
In the broader market context, the stock's short-term performance aligns closely with the benchmark, as both the stock and the Sensex have seen negative returns over the past week, with the Sensex down by 1.18%. Despite the recent decline, Sterlite Technologies has shown resilience with a 27.73% return over the past year, contrasting with the Sensex's negative return of 3.77%. The company has reported positive financial results in the last two quarters, including significant growth in net sales and operating profit, which suggests underlying strength. However, the recent drop in investor participation may signal caution among investors, impacting the stock's price movement.