Why is ERIS Lifescience falling/rising?

As of 18-Sep, ERIS Lifesciences Ltd's stock price is currently at 1,637.90, reflecting a decrease of 7.35 points or 0.45%. The stock has been underperforming, having fallen consecutively for the last two days, with a total decline of 1.39% during this period. It has also touched an intraday low of Rs 1605.65, indicating a significant drop of 2.41%. Over the past week and month, the stock has seen declines of 3.48% and 5.26%, respectively, while it has performed well year-to-date with a gain of 19.65%. Despite its strong management efficiency, low debt levels, and high institutional holdings, the stock's recent performance has been negatively impacted by falling investor participation, as evidenced by a 47.26% drop in delivery volume compared to the five-day average.
Broader market context shows that while the Sensex has gained 1.80% over the past week and 2.14% over the past month, ERIS Lifesciences has lagged behind with its negative returns. The stock's performance has been particularly notable over the longer term, with a 17.61% gain over the past year, significantly outperforming the broader market's negative return of -1.96%. However, the recent underperformance in the short term suggests that investor sentiment may be shifting, possibly due to the stock's declining trading volume and its inability to maintain momentum against a backdrop of a rising market.