Why is SPARC falling/rising?

As of 24-Sep, Sun Pharma Advanced Research Company Ltd's stock price is currently at 136.60, reflecting a decrease of 2.75, or 1.97%. The stock has been on a downward trend, having underperformed its sector by 1.52% today and experiencing a consecutive decline over the last five days, resulting in a total drop of 5.53%. The stock's performance has been notably poor over the past year, with a staggering decline of 37.51%, while its net sales have decreased significantly, indicating weak long-term growth and a negative book value. Additionally, the company's ability to service its debt is compromised, as evidenced by a poor EBIT to Interest ratio. Despite a rise in delivery volume, the overall sentiment remains negative due to the company's weak fundamentals.
In the broader market context, the stock's short-term performance has significantly lagged behind the benchmark, with a 1-week return of -5.53% compared to the Sensex's -1.18%. Over the past year, while the Sensex has only declined by 3.77%, SPARC has faced a much steeper decline, highlighting its consistent underperformance. This trend has persisted over the last three years, where the stock has underperformed the BSE500 in each annual period, further emphasizing the challenges the company faces in regaining investor confidence amidst its financial struggles.