Why is Vinati Organics falling/rising?

As of 21-Aug, Vinati Organics Ltd is currently priced at 1,687.10, reflecting a decrease of 16.7 points or 0.98%. The stock has been underperforming, having fallen consecutively for the last two days, resulting in a total decline of 3.24% during this period. In terms of returns, the stock has experienced a significant drop of 13.26% over the past month and 14.58% over the past year, while it has underperformed against the benchmark Sensex in each of the last three annual periods. Despite a high management efficiency indicated by a return on equity (ROE) of 16.68% and a low debt-to-equity ratio, the company's long-term growth prospects appear poor, with operating profit growth averaging only 13.67% over the last five years. Additionally, the stock's valuation is considered expensive with a price-to-book ratio of 6.3, which may deter investors.
In the broader market context, the stock's recent performance contrasts with the Sensex, which has gained 1.74% over the past week, while Vinati Organics has only increased by 1.15% in the same timeframe. This underperformance is further highlighted by the stock's year-to-date decline of 6.27%, compared to the Sensex's gain of 4.94%. The rising investor participation, indicated by an 89.53% increase in delivery volume, suggests some interest, but it has not translated into positive price movement. Overall, the combination of poor long-term growth, high valuation concerns, and consistent underperformance against the benchmark contributes to the stock's downward trend.