Why is SPARC falling/rising?

As of 14-Jul, Sun Pharma Advanced Research Company Ltd's stock price is currently at 160.80, reflecting an increase of 1.35 (0.85%). The stock has been gaining for the last two days, with a total return of 3.11% during this period. It has also shown a positive performance today, touching an intraday high of Rs 163.05. However, despite this recent uptick, the stock has underperformed significantly over the longer term, with a year-to-date decline of 19.70% and a one-year return of -31.86%. The company's negative book value and weak long-term fundamentals, including a poor EBIT to Interest ratio and declining net sales, contribute to a perception of risk, which may temper enthusiasm despite recent gains.
In the broader market context, the stock's recent performance contrasts with the benchmark, as it has outperformed the Sensex over the past week with a return of +2.42% compared to the benchmark's -1.42%. However, over the longer term, the stock has consistently underperformed against the benchmark, with a three-year return of -25.07% compared to the Sensex's +53.99%. This persistent underperformance, coupled with the company's weak financial indicators, suggests that while there may be short-term gains, the overall outlook remains challenging, impacting investor sentiment and potentially limiting future price increases.