Why is Zim Laboratories falling/rising?

As of 29-Oct, Zim Laboratories Ltd's stock price is currently at Rs 82.73, reflecting a significant increase of Rs 13.7 or 19.85%. The stock has shown strong performance recently, gaining 19.97% over the last two days and outperforming its sector by 19.11% today. However, despite this short-term rise, the stock has experienced a decline of 22.68% year-to-date and 20.68% over the past year. Notably, the stock's trading volume has decreased significantly, with delivery volume falling by 89.48% compared to the five-day average, indicating a potential lack of investor confidence despite the recent price increase.
In the broader market context, Zim Laboratories' short-term performance of +20.28% over the past week stands in stark contrast to the Sensex, which has only increased by 0.68% during the same period. This suggests that while the stock is currently experiencing a rebound, it has struggled significantly over longer time frames, as evidenced by its substantial declines over one year and three years compared to the benchmark's gains. The stock's moving averages indicate it is performing better than its shorter-term averages but remains below its longer-term averages, reflecting mixed investor sentiment.