Why is Vista Pharma. falling/rising?

As of 27-Oct, Vista Pharmaceuticals Ltd is experiencing a price increase, with its current price at 10.09, reflecting a change of 0.15 or 1.51% upward. The stock has shown a positive performance today, outperforming its sector by 1.63% and has been gaining for the last two days, accumulating a total return of 3.17% during this period. However, despite this short-term gain, the stock has a mixed performance in the longer term, with a 1-month decline of 1.46% and a year-to-date drop of 14.35%. Notably, there has been a significant decrease in investor participation, with delivery volume falling by 92.64% against the 5-day average, which could indicate waning interest among investors.
In the broader market context, Vista Pharmaceuticals' recent performance contrasts with the benchmark, as it has outperformed the Sensex by 7.23% over the past week, while the Sensex itself has only gained 0.49%. Despite the recent uptick, the stock's year-to-date performance remains significantly lower than the benchmark's 8.50% increase. This suggests that while the stock is currently rising, it is still underperforming relative to the broader market over a longer timeframe, indicating potential challenges ahead.