Why is Vista Pharma. falling/rising?

As of 26-Sep, Vista Pharmaceuticals Ltd is experiencing a price increase, currently at 10.24, reflecting a rise of 0.52 or 5.35%. The stock has shown a strong performance today, outperforming its sector by 7.69% and has been on a gaining streak for the last three days, accumulating a total return of 7.23% during this period. However, despite this short-term gain, the stock has underperformed over the longer term, with a year-to-date decline of 13.07% and a significant drop of 26.86% over the past year. The company faces challenges with operating losses and a weak long-term fundamental strength, as indicated by a negative EBITDA and poor growth in net sales and operating profit over the last five years.
In the broader market context, while Vista Pharmaceuticals has shown a positive short-term return, the benchmark, represented by the Sensex, has declined by 2.66% over the past week. This contrast highlights the stock's recent resilience despite its overall poor performance in the longer term, where it has lagged behind the BSE500 index. The pharmaceuticals and drugs sector has also seen a decline of 2.35%, which adds to the complexity of the stock's movement. The rising investor participation, indicated by a significant increase in delivery volume, suggests some renewed interest, but the company's fundamental weaknesses may continue to pose risks to its long-term viability.